The atomic number, z, is the number of protons. Assuming that this is an electrically neutral atom -the number of protons equals the number of electrons-, we can say that the atomic number is 4.
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The representation of an element includes a superior number that indicates the massic number, and an inferior number that indicates the atomic number. We need to know that every atom is identified by its number of protons and neutrons. So,
Representation ⇒ ᵃ X ₀
Where
• X is the element
• a is representing the massic number, which is defined as the sum of the number of protons and the number of neutrons.
• z is the atomic number, which is the number of protons ⇒ represented as
0 above
In electrically neutral atoms, the number of protons equals the number of electrons. This means that the atomic number also indicates the number of electrons.
• We will call n to the number of neutrons, which equals a - z
When protons, neutrons, and electrons get together to form an atom, they lose part of their mass as energy. This is why the atomic weight is slightly inferior to the sum of masses.
So, what you need to know is that
• Nº of protons = Atomic number → z
• Nº of neutrons = Massic number - Atomic number → n = a - z
• Nº of Electrons = Nº of protons = Atomic number → z
Let us analyze the carbon example.
Element representation ⇒ ¹⁴ C ₆
• Massic number = 14
• Atomic number = 6
So, from this information we can assume that
• Nº of protons = Atomic number → 6
• Nº of neutrons = Massic number - Atomic number → 14 - 6 = 8
• Nº of Electrons = Nº of protons = Atomic number → 6
In the exposed example, we have an element, let us name it X with 5 netrons and 4 electrons. And we need to say what is the atomic number, z. In this example we do not need to do perform any calculations, because we already know that the atomic number = number of protons = number of electrons, so
• Nº of neutrons = Massic number - Atomic number → 5
• Nº of Electrons = Nº of protons = Atomic number → 4
from this information we can assume that the massic number is 9, because the massic number = number of protons + number of neutrons.
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Which test would show positive for orange juice
Answer:
Lugol's test
Explanation:
Orange juice contains varied vitamins such as vitamin C. The test that shows positive results for orange juice is Lugol's test.
How many first-level consumers are in the food web below? *
Answer:
2: Shrubs and grasses
Explanation:
Shrubs and grasses are both first level consumers, obtaining their energy from the sun. They are also the source, essentially, of the entire food web's food sources.
Please do not copy and paste others work I need this soon
Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.
An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant.An erupting volcano is an active volcano that is having an eruption...A dormant volcano is an active volcano that is not erupting, but supposed to erupt again.An extinct volcano has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future.
Explanation:
What are the components of the ABC model of attitudes?
O A. actions, behaviors, and conditions
OB. affective, behavioral, and cognitive
Oc. antipathy, balanced view, and clarity
OD.
D. awareness, beliefs, and correlation
Answer:
The answer is B.
Explanation:
Answer:Our attitudes are made up of cognitive, affective, and behavioral components.
Explanation:The ABC model was introduced by Albert Ellis as a method to bring about change in people experiencing negative attitudes. It was felt that if an individual could understand where the negative was derived from, a person could overcome it.
why does the vagina get wet ?
Answer: From getting turned on
Explanation:
Answer: Hor/mon/es among Other things
Explanation:
Aro. usal; As you become arou. sed, blood flow to your geni. tals increases, which triggers the release of fluid from the cer. vix and the Bar tholin’s glands, which provides lubr. ication during sex. ual activity. Often, the more arou. sed you’re feeling, the more va. ginal lub. rication your body will produce. Horm ones and age; Horm. ones play a big role in va. ginal wet. ness. Higher estro. gen levels lead to increased va. ginal we. tness, but as your body starts to produce less estr. ogen during meno. pause and afterwards, your body may not produce as much va. g inal fluid, making your va gina drier. Meanwhile, as you move through your men. strual cycle and ovul. ation approaches, your cer. vix produces more va. ginal fluid, which plays an important role in helping sp. erm travel to an egg during the process of fer. tilization. Infection; Sometimes you will feel more we. t than usual if you have an infection such as bacterial va. ginosis. The va. ginal fluid helps to remove bacteria from the va. ginal canal. Infections may also lead you to produce other types of va. ginal dis. charge, which will vary in appearance depending on the type of infection. But if you notice any disch. arge that’s an abnormal color or smell, you’ll want to get in touch with your physician. Medication; Horm. onal birth control can alter your va. ginal fluid production, leaving you more w.et or dry than you’re used to when not taking the medication.
does anyone know which option?
Answer:
B
Explanation:
in photosynthesis CO2 is used to produce glucose NOT energy.
in cellular respiration O2 is used to produce energy NOT CO2.
in cellular respiration oxygen is used to produce energy and CO2.
Which of the following describes a virus?
A. A virus does not have a cell wall, nucleus, and eats.
B. A virus has a cell, a nucleus, and does not eat.
C. A virus does not eat, use energy, or have cells.
D. A virus does not have a cell, produces carbon dioxide, and uses oxygen.
A virus does not eat, use energy, or have cells. The correct option is C.
What is basically a virus?A virus is an infectious microbe made up of a nucleic acid segment (either DNA or RNA) surrounded by a protein coat.
A virus cannot replicate on its own; instead, it must infect cells and use host cell components to replicate itself.
Viruses are bundles of nucleic acid DNA or RNA encased in a protein shell called a capsid.
Viruses are the most abundant life form on the planet, according to some estimates; they are 10 times more numerous than bacteria.
Viruses could have evolved from mobile genetic elements with the ability to move between cells.
Thus, the correct option is C as a virus does not consume food, generate energy, or have cells..
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which of the following characteristics would be most accurate in hierarchically classifying a newly discovered organism?
habits
behavior
generic material
reproductive strategies
Choose all that apply below to RNA (Hint: there are 6 correct responses): Question 2 options: Double strand helix Contains guanine Contains uracil Contains adenine Contains cytosine Contains thymine Contains the original code to make proteins. Single strand helix Takes the original code out of the nucleus and translates it into proteins.
Hi there! I've taken the test and below are the answers:
1. Single Strand Helix
2. Contains Uracil
3. Contains Adenine
4. Contain Cytosine
5. Contains Guanine
& 6. Takes the original code out of the nucleus and translate it into proteins
Hope this helps you out and have a great day :)
Patrick loves bubble gum and would like to be able to blow bigger bubbles than anyone else
in Bikini Bottom. To prepare for the Bikini Bottom Big Bubble Contest, he bought five different brands of
bubble gum and needs your help to find the brand that creates the biggest bubbles. Write an experiment to
test the bubble power of the bubble gum brands and help Patrick win the contest.
Answer:
Abstract:
The purpose of the experiment was to determine which brand of bubble gum could inflate the most under a given set of controls.
5 brands were tested under controlled circumstances such as:
- Zero wind space
- Consideration was given for the bubble gum that could achieve the highest size given the maximum chew of 40 times.
- to ensure that a reasonable average was given for each brand, the test was repeated thrice per brand the size per bubble gum was recorded and the time and the average computed.
Introduction:
In this experiment, the brand of bubble gum with the ability to inflate to the biggest size was tested
Hypothesis
The bubble gum with the biggest average size is the best bubble gum to enter the competition with. It guarantees that Patrick's chance of winning under very stringent circumstances is guaranteed.
Procedure
First, Patrick must create a table with 6 columns and 3 rows.
the first column will be the Serial number sectionThe topmost row of each of the five columns will be labelled with one brand of gumPatrick will need an assistant who will help to measure the sizes of each bubble and also act as a time-keeper. For each brand of gum, Patrick will chew for at least 40 times before he starts to inflate them.The timekeeper will, with the help of a stopwatch, measure how long it took to inflate a brand of gum. Each brand will be inflated at 3 times. Each result will be recorded in the rows under the column for that brand.In order to further ensure that there is control, after each inflation, Patrick must chew each gum for 20 timesThe experiment must be carried out in a room that is not windyMaterials
StopwatchElectronic or Manual SpreadsheetIf Manual Spreadsheet then a writing material will be requiredAssistant for observing and recording the time and size of each inflationA mirror this is optional given that there is an assistanta well-lit room void of fan or windA calculator if a manual spreadsheet is used.
Conclusion
Here Patrick will indicate the result of the experiment and calculations.
Cheers
how is average velocity calculated
Answer: (v) of an object is equal to its final velocity (v) plus initial velocity (u), divided by two. Where: ¯v = average velocity. v = final velocity.
Explanation:
The average velocity of an object is its total displacement divided by the total time taken. In other words, it is the rate at which an object changes its position from one place to another.
Which of the following is true about scientific theories?
A. Theories may change depending on new evidence.
B. Theories are the best explanations provided without any evidence.
c. Theories are opinions developed by scientists.
D. Theories are explanations that will never change
Help please!
What statement is true regarding active transport
Answer:
Substances can move from areas of low concentration to high concentration.
Explanation:
For the first one, substances CAN move in and out of cells in an active transport.
As for the second one, active transports do require energy. That is what makes them "active" and sets them apart from passive transports which don't require energy.
Lastly, substances can move across a membrane regardless of if they are water soluble (such as lipids, or fats that the cell does not use. Think of it as a way for the cell to eat, drink, and defecate or remove waste.)
The mass of an object is the
a) force of gravity acting on it
B)amount of matter it contains
C)amount of space it takes up
D)amount of water it displaces
Answer:
the amount of matter it contains
Explanation:
mass is the amount of an object contained
in it
Answer this will mark brainliest
Answer:
D. 0 K (kelvin)
This is absolute zero, and nothing can go below this.
0 K is equal to -523 degrees Fahrenheit
Please help :)
Describe the end result of mitosis in eukaryotes
Answer:
Two genetically identical diploid daughter cells
Explanation:
Mitosis is the process of cell division through which cells proliferate to create new cells. It allows organisms to grow and replace/repair tissues.
Before the cell divides, the diploid cell (two copies of every chromosome) duplicates its genetic material. During the stages of mitosis, the genetic material is divided between two new cells such that each cell contains a complete copy of the genetic information.
Therefore, at the end of mitosis are two genetically identical daughter cells, each with a diploid genome. Each cell is also identical to the starting cell.
How does global warming affect you?
Answer:
stresses ecosystems through temperature rises, water shortages, increased fire threats, drought, weed and pest invasions, intense storm damage and salt invasion,
Answer:
Medical and Physical Health, Mental Health, and Community Health.
Explanation:
Medical and Physical Health: heat related illnesses, allergies, and changes in fitness/activity level.
Mental Health: stress, anxiety, depression, grief; substance abuse, stains on social relationships, post-traumatic stress.
Community Health: increased interpersonal aggression, increased violence and crime, increased social instability, and decreased community cohesion.
Which of the following contribute to the elevated level of carbon in the atmosphere? a. greenhouse emissions b. deforestation c. humans d. all of the above
Answer:
d. all of the above
Explanation:
All of the given choices contribute to the elevated level of carbon in the atmosphere.
This is one of the leading cause of climate change.
Greenhouse emissions from the surface is a huge problem which originates from increasing the release of these gases into the atmosphere. Carbon dioxide is one of the greenhouse gases, and it is the main component of the emissions. Deforestation involves the removal of trees from the earth surface. Trees naturally removes carbon from the environment. They use the carbon to manufacture their own food. Human activities such as industrial processes, burning of firewood for cooking, etc. all contributes significant amount of carbon into the atmosphere.What Structure can be found in both a virus and a cell?
Answer:
Nucliec Acid :)
Explanation:
Mrs. Canales pointed to an apple sitting on her desk.
She asked her students to describe any forces acting
on the apple. This is what some of her stu-
dents said.
Archie: "The only force acting on the
apple is air pressure."
Sam: "There is one force acting on the apple. Gravity is the force that pulls on
the apple."
Soledad: "There are two forces: the desk pushes up on the apple and gravity pulls
downward on the apple."
Misha: "There are many forces acting on the apple; but, it is the holding force in the
apple that keeps it on the desk."
Tess: "There are no forces acting on the apple because the desk stops any forces
from acting on it."
Which student do you most agree with?
Answer:
Misha
Explanation:
Archie, Soledad and Sam are right about the types forces, but not how many. Misha is the only one who says there are multiple. Tess is just wrong.
When viewing a specimen in a microscope, which parts allow you to physically SEE the image?
stage
eyepiece Only
objective only
eyepiece and the objective
Answer:
When viewing a specimen in a microscope, what allows to physically see the image are both lenses, eyepiece and objective.
Explanation:
In optical microscopy, the lenses used to observe microscopic samples play an important role and are necessary for the study of such samples.
- An objective lens is the first to capture the image, providing clarity and proper focus, as well as eliminating color or shape distortions.
- Eyepiece lens obtains the image provided by the objective lens and enlarges it, so that the observer can appreciate the characteristics of the specimen studied.
Regarding other options:
Stage allows to see the prepared sample, ready for its study, but the microscopic characteristics are not appreciated. The eyepiece and objective work together to provide a proper microscopic image.What must be found in each of the two daughter cell in order for them to be functional??? 15 POINTS!!!
Warm air always wants to _________________.
a. rise (will give brainiest)
B. fall
c. move left
d. move right
Answer: A(Rise)
Explanation: Air flows from high pressure, to low pressure. for example: there are 2 rooms, one is cold and is warm that of warm room is thinner air rising towards the ceiling when the air from the two rooms gets mixed. now the cold air will be leaving the room close to the floor. At the same time, warm air from the warm room will rise and move into the cold room close to the ceiling
_are essential in the conversion of nitrogen-containing compounds to
nitrogen forms that are accessible and usable by plants.
A. Decomposers
B. Autotrophs
C. Heterotrophs
D. Chemotrophs
Chemotrophs (Bacteria) are essential in the conversion of nitrogen containing compounds to nitrogen forms that are accessible and usable by plants.
A 0.057 kg tennis ball and a tennis racket collide. The racket has an initial
momentum of -3.15 kg-m/s and a final momentum of -2.21 kg.m/s. The ball
has an initial momentum of 0.03135 kg.m/s. If you assume the collision is
elastic, what is the final velocity of the ball?
A. -15.94 m/s
B. -93.55 m/s
C. -0.90 m/s
D.-5.33 m/s
Answer:15.94 m/s
Explanation:
Apex
Answer:-15.94m/s
Explanation:
Please Help me with this question!!
How does water transfer when it evaporates from the ocean?
Answer:Most of the water that evaporates from the oceans falls back into the oceans as precipitation. Only about 10 percent of the water evaporated from the oceans is transported over land and falls as precipitation. Once evaporated, a water molecule spends about 10 days in the air.
Explanation:
The first step in DNA replication is
The first step is to basically sort of “unzip” the double helix.
gust say DAD 10 time and you wi;; get 20 points
Answer:
dad dad dad dad dad dad dad dad dad dad
Explanation:
dad dad dad dad dad dad dad dad dad dad ;)
compare an contrast inner planets and outer planets
Answer:
Both the inner and outer planets must have created using an intense amount of force and collision
Explanation:
Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets might have shifted due to gravitational interactions
The inner and outer planets differ in position, size, compositions, densities, atmospheres, and moon.
The four planets in our solar system that are closest to the Sun are referred to as inner planets, sometimes known as terrestrial planets or rocky planets. Mars, Venus, Mercury, and Earth are among these planets.
The four planets in our solar system that are furthest distant from the Sun are referred to as outer planets, gas giants, or Jovian planets. These planets include Neptune, Jupiter, Saturn, and Uranus.
The positioning, sizes, compositions, densities, atmospheres, and moon systems of inner planets differ significantly from those of outer planets. Inner planets have fewer moons, are smaller, more rocky, denser, have a variety of atmospheres, and are located closer to the Sun. The sun-farther, bigger, gaseous, less dense, widespread, hydrogen- and helium-dominated atmospheres, and numerous moons of the outer planets all contribute to their distance from the sun.
Hence, the inner and outer planets differ in position, size, compositions, densities, atmospheres, and moon.
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