Which of the following is the correct Lewis Dot Structure for MgBr2?
PHOTO ABOVE
Answers
Answer:
Option A
Explanation:
To know the correct answer to the question, let us write an equation illustrating the formation of MgBr₂.
This is illustrated below:
1. Magnesium (Mg) is divalent element hence it will lose 2 electrons to form magnesium ion (Mg²⁺) as shown below
Mg —> Mg²⁺ + 2e¯
2. Bromine (Br) is a univalent element. Two bromine atom will receive the two electrons (i.e each atom receives 1 electron) to form the bromide ion (Br¯) as shown below:
2Br + 2e¯ —> 2Br¯
Combine both equation
Mg + 2Br + 2e¯—> Mg²⁺ + 2e¯ + 2Br¯
Cancel out 2e¯
Mg + 2Br —> Mg²⁺ + 2Br¯
Thus we have
Br—Mg—Br
From the illustration made above, we can see that two bromine atom is receiving 1 electron each from the magnesium atom
Related Questions
If the approximate density of 6.5 L of ethanol is 0.79 g/ mL, what is the mass in grams?
Answers
Answer:
The answer is 5135 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
density = 0.79 g/mL
1 L = 1000 mL
6.5 L = 6500 mL
We have
mass = 0.79 × 6500
We have the final answer as
5135 gHope this helps you
Identify the group number of following oxides/hydrides in Mendeleev
periodic table:
i) R2O3 ii) R2O iii) RO2 iv) RH2 v) R2O7 vi) RH3
Answers
Answer:
See explanation
Explanation:
The oxides or hydrides are formed by exchange of valency between the two atoms involved. The group of the atom bonded to oxygen or hydrogen in the binary compound can be deduced by considering the subscript attached to the oxygen or hydrogen atom.
Now let us take the journey;
R2O3- refers to an oxide of a group 13 element, eg Al2O3
R2O - refers to an oxide of group a group 1 element e.gNa2O
RO2 - refers to an oxide of a group 14, 15 or 16 element such as CO2, NO2 or SO2
RH2 - refers to the hydride of a group 12 element Eg CaH2
R2O7 - refers to an oxide of a group 17 element E.g Cl2O7
RH3- refers to a hydride of a group 13 element E.g AlH3
Pleaseee help meeeeeee
Answers
Answer:B
Explanation:
Heat boils it will get hot no heat/cold will freeze
what is irons number
Answers
Answer:
Iron's atomic number is 26
Explanation:
When Liza was reading over the “Best of Blueberries” article, she quickly changed the claim in the article that read “1 cup of blueberries contains around 180 calories” because 1 cup of blueberries actually only contains about 80 calories. What does Liza MOST LIKELY do for a living?
researcher/fact checker
copy editor
commissioning editor
editorial expert
Answers
Answer:
your Answer is The first one, Its A, resercher/ fact checker
Explanation:
which element is most likely to have an oxidation number of -2?
A. F
B. NE
C. CA
D. O
Answers
Answer:
D. O
_________________________________
F ----------¢ - 1
Ne --------¢ 0
Ca --------¢ + 2
Answer:
D. O
Explanation:
Which mineral is soft enough to be scratched by a fingernail?
a)
corundum
b)
calcite
c)
talc
d)
topaz
Answers
Answer:
Talc
Explanation:
Talc only has a hardness of one on the Moh's scale of hardness. This translates into a very soft material, which results from its layered nature. Naturally, this substance is hydrophobic (dislikes water), and tends not to absorb water, therefore giving some of its favourable water-resistant characteristics.
Electrons have single negative charges. What does this mean?
Answers
So long as it is not an ion, the charge of this atom will always be 0 overall, with the same amount of protons as electrons. So one singular electron with no proton to balance it out must have a negative charge equivalent to the number of electrons more than protons. Thus the overall charge must be 1-.
What is conserved in physical changes?
shape
energy
mass
density
Answers
Answer:
The answer is C.
Explanation:
By the Law of conservation of mass, when a element, or product undergoes a physical change, mass always stays the same.
Hope you have a good day.
During physical change the mass of the material remains conserved. The correct option is C.
What is physical change?Even before to and after a physical change, the material implicated is unique architectural the same.
Physical changes include texture, shape, heat, and the beginning of a change in the state of matter. The texture of a substance influences how it feels.
A physical change is simply a change in appearance. The situation has not changed since the change.
Physical change can be seen in the use of cutting paper, melting butter, dissolving salt in water, and breaking glass.
Mass is neither created nor destroyed in chemical or physical changes, according to the law of conservation of mass.
Physical changes occur when the phage of a substance changes without changing its chemical composition.
Thus, the correct option is C.
For more details regarding physical changes, visit:
https://brainly.com/question/17931044
#SPJ6
If an atom has 14 protons, 13 neutrons, and 14 electrons, what is it?
-silicon-14
-silicon-13
-silicon-27
-silicon-28
-none of these
Answers
Answer:
cilicon 14
Explanation:
where might u find examples of series & parallel circuits in everyday life
Answers
Answer: Here are some examples!
Explanation: An example of a series circuit is a string of Christmas lights. If any one of the bulbs is missing or burned out, no current will flow and none of the lights will go on. Parallel circuits are like the smaller blood vessels that branch off from an artery and then connect to a vein to return blood to the heart.
anywhere inside ur house lma.o.
Calculate the mass of the following:
9.11 mol He
Answers
Answer:
36.44 g of He
Explanation:
To convert from moles to grams, you simply multiply by the atomic mass. The conversion table looks like the following:
[tex]\frac{9.11 mol}{1}[/tex] * [tex]\frac{4.00 g}{1 mol}[/tex]
The mol units then cancel, and you are left with 36.44 g of Helium.
how many valence electrons does hydrogen have
Answers
Answer:
one valence electron
Explanation:
Each hydrogen atom has one valence electron and is univalent.
Which type of compounds are formed by ions that have opposite charges?
A. molecules
B. covalent
C. ionic
D. metallic
Answers
Answer:
c
Explanation:
if you need explanation, ask freely
Explanation: none
What was the most likely problem with the first set of
data?
O It was inadequate.
O It was false.
O It was recorded by one person.
O It was not recorded in a lab.
Answers
Answer:
it is A
Explanation:
What term describes the smallest unit that can perform all of the functions necessary for life
Answers
Answer:
Cell
A cell is the smallest unit of a living thing. Cells are the basic building blocks of all organisms
Placing a sample of iron (II) oxide into a graduated cylinder makes the water volume increase 12.0 ml. The weight of the sample is 76.6g. What is it’s density? (Round to the nearest hundredths)
Answers
Answer:
The answer is 6.83 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass of iron (II) oxide = 76.6 g
volume = 12 mL
We have
[tex]density = \frac{76.6}{12} \\ = 6.3833333...[/tex]
We have the final answer as
6.83 g/mL to the nearest hundredthHope this helps you
Answer:
it 76.6
Explanation:
cause it is what it is
Which is responsible for an atom’s identity?
A.Protons
b.Electrons
c.Neutrons
d.Valence electrons
Answers
many reactive chemicals are stored in containers filled with Argon gas for safekeeping what about Argon's atomic structure makes it safe to store reactive chemicals in?
Answers
Answer:
Argon has 8 valence electrons making it non reactive.
Explanation:
Reactive chemicals are store in containers filled with Argon gas because the argon gas is non reactive. This is true because the argon gas has completely filled octet structure.
This can further be explained by writing the electronic configuration of argon.
The electronic configuration of argon is given below:
Ar (18) => 1s² 2s²2p⁶ 3s²3p⁶
Valence electron => 3s²3p⁶ = 2 + 6 = 8
From the above illustration, we can see that the outermost shell (i.e 3s²3p⁶) is having 8 electrons indicating that it is completely filled as the maximum number of electrons any shell can accommodate outside the first shell is 8 electrons. Thus, argon has 8 valence electrons ( i.e electrons in the outermost shell) and hence it is non reactive as the outermost shell is completely filled.
Which element has a greater atomic radius? Fluorine or Potassium
Answers
Answer:
An atom is a basic unit of a chemical element, such as hydrogen, helium ... a fluorine atom since the three additional protons the fluorine has will pull its ... As an example, potassium (K) has a larger average atomic radius (
Match each term to its correct description
1) Limiting reactant
2) Theoretical yield
3) Excess reactant
a) Reactant that has some leftover at the end of the reaction
b) Reactant that is entirely used up in the reaction
c) Mass of product that can be made by the given masses of reactants
Answers
Answer:
C
A
B
Explanation:
Excess reactant: Reactant that has some left over at the end of the reaction
Limiting reactant: Reactant that is entirely used up in the reaction
Theoretical yield: Mass of product that can be made by the given masses of reactants
The terms have been correctly matched to their descriptions as follows:
Limiting reactant: b) Reactant that is entirely used up in the reaction.Theoretical yield: c) Mass of product that can be made by the given masses of reactants.Excess reactant: a) Reactant that has some leftover at the end of the reaction.What is a Reactant?A reactant is a chemical compound or element that participates in a chemical reaction.
The limiting reactant is completely used up after the reaction while the excess reactant is the compound or element that is much more than what is normally required to complete the reaction.
The theoretical yield is the maximum quantity of the product that can be formed by the reactants.
Learn more about reactants here:
https://brainly.com/question/6421464
The density of a pillow is greater than the density of a rock. Is this true of false
Answers
Answer:
I think it's false it helps you...... Thank you ☺️☺️The weather changed from cold to warm. Jessica was excited because should could wear her new flip flops and shorts to school. She had her science laboratory later in the day.
What should she do to be safe?
Answers
Which of the following forces weathers objects by expanding and changing shape?
Moving water
Wind
Plants
Ice
Answers
Moving water
Can someone please explain to me how I’m supposed to figure out the element with these configurations??
Answers
12. Boron
13.Strontium
14. Hydrogen
15 and 16. Potassium
If you google electron configurations periodic table you can see all the orbital and sub levels types and you just simply count until you reach the end of the configuration given.
I need help on this problem. I need it answered ASAP
Answers
Use this formula: Density = Mass/Volume
Given in the question:
Mass: 10g
Volume: 5cm3
The calculations:
Density = Mass/Volume
= 10/5
= 2g/[tex]cm^{3}[/tex]
Therefore, the density will be 2g/[tex]cm^{3}[/tex]
A spectral line is read
to have a wavelength of 4700A. What is
this in meters?
Answers
Answer:
[tex]4.7 * 10^{-7} meters[/tex]
Explanation:
Angstrom can be defined as a metric unit of length for used for the measurement of the wavelength of light (optics) such as visible light, x-rays, ultraviolet light, gamma rays etc. The symbol for Angstrom is "A" and it is named after the 19th century physicist from Sweden, named Anders Jonas Angstrom.
Given the following data;
Wavelength of spectral line = 4700A
To convert this value to meters;
One Angstrom is mathematically equal to [tex] 10^{-10} meters [/tex]
[tex] 1 Angstrom = 10^{-10} meters[/tex]
[tex] 4700 Angstrom = X \; meters[/tex]
Cross multiplying, we have;
[tex] X = 4700 * 10^{-10}[/tex]
X = [tex]4.7 * 10^{-7} meters[/tex]
Therefore, 4700A is equal to 4.7e-7 or 0.00000047 meters.
1. John travels from the United States to Australia for the winter, but when he gets there it feels more like summer. Why?
Answers
Answer:
In Australia, it's warmer than most of the United States during winter.
Explanation:
A chemical reaction takes place to allow hand warmers to give off heat. This is an example of a(n) __________.
A. physical change
B. exothermic reaction
C. endothermic reaction
D. precipitate
Answers
Answer:
Exothermic
Explanation:
Exothermic reactions release heat, endothermic absorb heat, and precipitate is a solid formed from a solution
Answer:
B.
Explanation:
Gives off heat,.
I need help with 2, 3, and 4 please help i will give the brainliest
Answers
Answer:
2=2.28*10^5
3=3.98*10^3
4=5.76*10^3
