Answer:
c
Explanation:
Nitrogen is in period 2, and has electrons in both 1 and 2.
The electron seeks to go up to energy level n = 2 from level 1, which is the initial energy level. Since the second energy level has more energy than the first, the electron must gain energy to travel from n = 1 to n = 2. A neutral atom of nitrogen has electrons in energy levels are 1 and 2.
What is energy level ?Any discrete value from a set of total energy values for a subatomic particle constrained by a force to a finite space or for a system of such particles, such as an atom or a nucleus, is referred to as the energy level, also known as the energy state, in physics.
"Energy levels" refer to the areas around the nucleus where an atom's electrons are positioned. The 3-dimensional region around the nucleus where electrons are most likely to be is represented by an energy level.
Every component of the cycle of wellness depends on energy. Our attitude and physical health both get better as we get more energy. Connecting with people, exercising, and feeling driven to work hard and accomplish personal objectives are all more likely.
Thus, option C is correct.
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8. Calculate the mass of 3.47x 1023 gold atoms.
Answer:
the answer is 1.227
please guys help me with this
Answer:
It's B.
Explanation:
Quick chem question!
I’ll mark BRAINLIEST!!!!! :)
Why are black holes so difficult to detect?
Answer:
Black holes are so dense that light cannot escape from them, and they are difficult to detect. Satellites above the Earth's atmosphere can detect bursts of high energy radiation given off by black holes. Dozens of stellar black holes have already been detected in the Milky Way, where there may be tens of millions more.
Explanation:
how many different elements are there in the molecule C8H11NO2?
a. 21
b. 2
c. 4
d.11
Answer:
4
Explanation:
50 POINTS QUICK Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions.
Online Content: Site 1
What goods did the Ubaidian people produce? Describe their agricultural techniques. (Site 1)
Answer: Ubaidian people produce wheat, barley, and peas. Ubaidian people developed new agricultural technique in planting and harvesting their crops.
(I hope this helps ^^)
(6.2 x 10 5 ) / (2.5 x 10 -3 ) =
(6.2 x 10 5 ) x (2.5 x 10 -3 ) =
solve each scientific notation
Answer:
651/22 and 14322
Explanation:
A student accidentally left a bottle of ammonia unclosed in the corner of a laboratory
After a few minutes the entire laboratory smelled of ammonia.
Which process has occurred?
A
Brownian motion
B
Diffusion
с
Evaporation
D
Distillation
Answer:
Evaporation
Explanation:
because the ammonia is left unclosed
The smell of ammonia has been spread from a corner to entire room by the process of diffusion. Thus, option B is correct.
Ammonia has been the liquid compound with the formula [tex]\rm NH_4[/tex]. It has a pungent smell. Ammonia has been used in several synthesis reactions, and in various industrial processes.
The diffusion has been the process of transfer of molecules from higher concentration to lower concentration. The smell of ammonia has been spread in the entire laboratory from a corner.
The ammonia molecules in the bottle are at higher concentration while there has been lower concentration of ammonia in the environment. With the process of diffusion there has been the transfer of ammonia molecules in the environment.
Thus, diffusion has been responsible for spreading the smell of ammonia in the laboratory from a corner. Thus, option B is correct.
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A carver begins work on the following block of granite that has a mass of 2700 g. What is the density of the granite? 10 cm 5 cm 20 cm What is the volume of the granite? cm3 What is the density of the granite? The piece of granite would g/cm3 (float, sink) in water because
Answer:
I would say it would float do to the density a weight is not heavy enough to sink
Explanation: ✪ ω ✪ Hope Dis Helped!
a) Why is mole called fundamental
un
b) State the law of moment.
Explanation:
The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12. The mole is defined in terms of the physical properties of a real object, the carbon atom. Therefore it is a base unit. ...
Microwave Miracle: Patrick believes that if fish eat microwaved food then they be able to swim through a maze faster. He decides to perform an experiment by placing fish food in a microwave for 20 seconds. He has the fish swim through a maze and records the time it takes for each one to make it to the end. He feeds the microwaved food to 10 fish (group A) and gives regular food to 10 others (group B). After 1 week, he has the fish swim through the maze again and records the times for each. Which fish are in the control group? * Group A Group B Microwaved Food Non-microwaved Food
Answer:
Group B
Explanation:
The fish in group B are those in the control group.
A control group during an experiment represents a group of the subject that is subjected to all experimental variables except the independent variable - the manipulate-able variable that is supplied by the experimenter which directly affects the dependent variable.
In this case, the independent variable is the type of food given to the two groups of fishes - microwaved or regular food while the dependent variable is the time it takes for the fishes to swim through the maze. Since the focus of the experiment is to see if microwaved food enhances the swimming speed of fishes, the group of fish that receives microwaved food would represent the treatment group while those that received regular food would be the control group.
Hence, group B represents the control group.
why would an atom have zero charge
Answer:
The overall charge of an atom is zero. ... The charge from a proton or electron are of equal strength, therefore if an atom has an equal number of protons and electrons, it will be electrically neutral. However, atoms are not always electrically neutral, in which case they are called ions.
Explanation:
Sorry if it's wrong!!!!
If an astronomer was to look through a telescope and notice that a star's emitted light had a slightly red tint to it, compared to what the emitted light should be. What would that mean about that star?
Answer:
In the chapters that follow, we will provide the temperature of the stars we are describing, and this section tells you how those temperatures are determined from the colors of light the stars give off. Hubble Space Telescope image of the Sagittarius Star Cloud. The image shows many stars of various colors, white, blue, red and yellow spread over a black background. The most common star colors in this image are red and yellow. Figure 1: Sagittarius Star Cloud. This image, which was taken by the Hubble Space Telescope, shows stars in the direction toward the center of the Milky Way Galaxy. The bright stars glitter like colored jewels on a black velvet background. The color of a star indicates its temperature. Blue-white stars are much hotter than the Sun, whereas red stars are cooler. On average, the stars in this field are at a distance of about 25,000 light-years (which means it takes light 25,000 years to traverse the distance from them to us) and the width of the field is about 13.3 light-years. (credit: Hubble Heritage Team (AURA/STScI/NASA))
Color and Temperature
As we learned in The Electromagnetic Spectrum section, Wien’s law relates stellar color to stellar temperature. Blue colors dominate the visible light output of very hot stars (with much additional radiation in the ultraviolet). On the other hand, cool stars emit most of their visible light energy at red wavelengths (with more radiation coming off in the infrared) (Table 1). The color of a star therefore provides a measure of its intrinsic or true surface temperature (apart from the effects of reddening by interstellar dust, which will be discussed in Between the Stars: Gas and Dust in Space). Color does not depend on the distance to the object. This should be familiar to you from everyday experience. The color of a traffic signal, for example, appears the same no matter how far away it is. If we could somehow take a star, observe it, and then move it much farther away, its apparent brightness (magnitude) would change. But this change in brightness is the same for all wavelengths, and so its color would remain the same. Table 1. Example Star Colors and Corresponding Approximate Temperatures
Star Color Approximate Temperature Example
Blue 25,000 K Spica
White 10,000 K Vega
Yellow 6000 K Sun
Orange 4000 K Aldebaran
Red 3000 K Betelgeuse
Go to this interactive simulation from the University of Colorado to see the color of a star changing as the temperature is changed. The hottest stars have temperatures of over 40,000 K, and the coolest stars have temperatures of about 2000 K. Our Sun’s surface temperature is about 6000 K; its peak wavelength color is a slightly greenish-yellow. In space, the Sun would look white, shining with about equal amounts of reddish and bluish wavelengths of light. It looks somewhat yellow as seen from Earth’s surface because our planet’s nitrogen molecules scatter some of the shorter (i.e., blue) wavelengths out of the beams of sunlight that reach us, leaving more long wavelength light behind. This also explains why the sky is blue: the blue sky is sunlight scattered by Earth’s atmosphere.
Color Indices
In order to specify the exact color of a star, astronomers normally measure a star’s apparent brightness through filters, each of which transmits only the light from a particular narrow band of wavelengths (colors). A crude example of a filter in everyday life is a green-colored, plastic, soft drink bottle, which, when held in front of your eyes, lets only the green colors of light through. One commonly used set of filters in astronomy measures stellar brightness at three wavelengths corresponding to ultraviolet, blue, and yellow light. The filters are named: U (ultraviolet), B (blue), and V (visual, for yellow). These filters transmit light near the wavelengths of 360 nanometers (nm), 420 nm, and 540 nm, respectively. The brightness measured through each filter is usually expressed in magnitudes. The difference between any two of these magnitudes—say, between the blue and the visual magnitudes (B–V)—is called a color index. By agreement among astronomers, the ultraviolet, blue, and visual magnitudes of the UBV system are adjusted to give a color index of 0 to a star with a surface temperature of about 10,000 K, such as Vega. The B–V color indexes of stars range from −0.4 for the bluest stars, with temperatures of about 40,000 K, to +2.0 for the reddest stars, with temperatures of about 2000 K. The B–V index for the Sun is about +0.65. Note that, by convention, the B–V index is always the “bluer” minus the “redder” color. Why use a color index if it ultimately implies temperature? Because the brightness of a star through a filter is what astronomers actually measure, and we are always more comfortable when our statements have to do with measurable quantities.
Explanation:yw :P
a patient is prescribed tigan capsules for vomiting. The drug is available in the form of 300.0 mg tigan/capsules ,and is administered in 4.0 doses/day of 1 capsule/dose. How many g Tigan does the patient recieve in 2.0 days?
The patient recieves 2.4 g Tigan in 2 days
Further explanationIn finding the conversion units, we can multiply and eliminate the same units so that we can get the desired quantity or unit.
In this case, it is expected that the number of Tigan is known in 2 days, so we just need to multiply the numbers that are known
[tex]\tt =300\dfrac{mg}{capsules}\times \dfrac{1~capsules}{dose}\times 4.0\dfrac{doses}{day}\times 2.0~days\\\\=300\times 1\times 4.0\times 2.0~mg=2400~mg=\boxed{\bold{2.4~g}}[/tex]
arrange 0.35 kilograms 9.4 grams and 5 grams to smallest to largest
Answer:
5 grams < 9.4 grams < 0.35 kilograms
Explanation:
Kilograms (Kg) and grams (g) are both units of measurement for MASS quantity. However, these units are not the same as they vary in magnitude. The kilograms is bigger unit of measurement than the grams. 1000grams makes 1kilograms.
According to this question, 0.35 kilograms 9.4 grams and 5 grams are to be arranged in ascending order i.e. from smallest to largest. First, we need to change all the units to the same.
We change 0.35kg to g
Since 1000g = 1kg
Then, 0.35kg = 0.35 × 1000
= 350g.
Rearranging the values, we have:
5 grams < 9.4 grams < 0.35 kilograms
how many nuetrons are in chlorine 37?
Answer:
18
Explanation:
An element with 17 protons will always be chlorine. However an element's mass numbers can vary, which means that it can have different numbers of neutrons. So although chlorine has a mass number of 35 which means it has 18 neutrons.
Which of the following is a physical blend of two or more substances with uniform composition? Select all that apply.
A. Homogeneous mixture
B. Heterogeneous mixture
C. Solution
D. Pure substance
Answer:
homogeneous mixture
Explanation:
A homogeneous mixture and Solution are the physical blend of two or more substances with uniform composition. Thus, options A and C are true.
What do you mean by Mixture?“Mixture is an act of combining two or more chemical substances that are not chemically linked.”
Types of mixtures –
There are two main types of mixture.
Homogeneous Mixture –
A Homogeneous Mixture is a mixture in which composition is uniform throughout the mixture, and it appears like a single substance.
Example – Air is a homogeneous mixture of gas etc.
Heterogeneous mixture –
A Heterogeneous mixture is a mixture in which composition is not uniform throughout the mixture.
Example – Vegetable soup is a heterogeneous mixture etc.
Solution –
A Solution is a homogeneous mixture of two or more solutes dissolved in a solvent.
Example – Solution of sugar in water etc.
Thus, a homogeneous mixture and solution are the physical blends of two or more substances with uniform composition. Thus, options A and C are true.
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help please lol I’m stuggling
Answer:
balenced
Explanation:
Lewis Dot structure for N2?
PHOTO ABOVE
Is not D I got it wrong
Answer: C
Explanation:
The N2 should have a triple bond because it needs three covalent bonds to fill its outer shell. This means the two atoms need to share three electrons each.
It also serves as a nice illustration of a triple-bonded molecule. For the Lewis structure of N2, there are ten accessible valence electrons. Therefore, option C is correct.
What is lewis structure ?The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
It contradicts the octet rule, as shown by the production of molecules, and could not account for the release of energy during the formation of covalent bonds.
The three parallel lines between the N atoms represent three bonds. This is a triple bond, with one electron from each N atom contributing to each bond. A total of 6 electrons are thus represented by this triple bond.
Thus, option C is correct.
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Which process is represented by this diagram?
Answer:distillation
Explanation:
The process represented by the diagram is chromatography.
What is chromatography?
Chromatography is a separation technique used to separate components present in a mixture.It makes use of two phases the stationary phase and mobile phase .
Stationary phase is a phase in which the mixture components to be separated is loaded. Mobile phase is a phase which is run over the stationary phase so as to enables components of mixtures to separate.
Separation of components is based on the principle that components of mixture which are soluble in mobile phase travel large distances over stationary phase while those which are insoluble or less soluble travel less distances over stationary phase.
For every component which is separated, a Rf value can be calculated which is simply ratio distance traveled by solute divided by distance traveled by solvent front.
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Obsidian is a best fit to which of the following categories?
O Mineral
O Rock
O Mineraloid
O Mineralistic
First correct answer will get brainliest
O the elements that make up glucose are different than the elements that make up ethanol.
O the ratio of the elements is different in ethanol than in glucose.
O the chemical properties of the elements that make up the compounds are different.
O glucose has more elements than the ethanol.
Answer:
the second one
Explanation:
becuase i asked my teacher
Answer:this ? 2end one
Explanation:
which element has a grater atomic radius ?phosphorus or bismuth ?
Answer:
hello
Explanation:
bismuth has the greatest atomic radius.
All isotopes of sodium (Na) must have,
Answer:
11 protons and 11 electrons.
Explanation:
Na is a neutral element and element number 11.
This means that it has 11 protons and 11 electrons.
In order to create an isotope, you would add or get rid of neutrons to get different mass numbers but the same element. The number of protons and electrons would remain the same.
Using the image above, match A-G to their appropriate part of the periodic table. (If the image does not show, click on the link above for an alternative way to access the image.)
Question 5 options:
Metals
Period
Group/Family
Noble gases
Halogens
Metalloids
Nonmetals
1.
A
2.
B
3.
C
4.
D
5.
E
6.
F
7.
G
1. A ➡️ Metals
2. B ➡️ Metalloids
3. C ➡️ Non-metals
4. D- Column ➡️ Group/Family
5. E- Row ➡️ Period
6. F ➡️ Halogens
7. G ➡️ Noble gases
Explanation:
The Periodic Table is known to be an array of chemical elements that are organized in order of their increasing atomic number. That arrangement gives a recurring pattern known as the periodic law in their properties.
Periods are found in the horizontal rows (across) the periodic table, while groups are found in the vertical columns (down) the table.
The Periodic Table was discovered by D.I Mendeleev.
Find the isotope nation and the decay particle
If velocity is positive, which would most likely yield a negative acceleration?
A final velocity that is faster than an initial velocity.
A time that is less than a half hour.
An initial velocity that is faster than a final velocity.
A time that is greater than a half hour.
Answer:
C. An intitial velocity that is faster than a final velocity.
Explanation:
taking the test rn but it makes sense because you'd have to slow down to get a lesser final velocity.
Answer:
C
Explanation:
3. How do patterns in the periodic table predict the behavior and properties of elements?
Georgia has many invasive species including the gypsy moth, kudzu, boll weevil, and tropical spiderwort. All of these have led to the destruction of many local ecosystems, and have cost Georgian's millions of dollars. What characteristic of Georgia makes it a place where invasive species often end up? A) more forest space than any other state B) shrinking population leaving room for other organisms to live C) the lack of a variety of species opens the door to invasive ones D) hundreds of miles of highway, a very large airport, and many ports for ships and cargo
Answer:
C.
Explanation:
Invasive species are the non-native species in a particular area, society or environment causing more havoc than good. Invasive species are introduced into the environment through many means which might be intentional and which might not.
One of the reason behind the presence of invasive species in Georgia is to augment the native specie present in Georgia at that time for instance, one of the invasive species mentioned in the question that is "kudzu" was introduced to the environment in Georgia as specie for controlling erosion.
Although some invasive species were introduced into Georgia by mistake, some invasive species were also introduce because of the need for new Specie in the environment.
Answer:
It's D
Explanation: i just took did it in USATESTPREP.
23. Color of a metter is
