If an atom the atomic number 10 and the mass number 12, how many VALENCE electrons does it have?

Answers

Answer 1
The answer for this is 22

Related Questions

Based on what you have read about wind turbines and dams, how does a generator work? A loop of Answer spins in a Answer field, producing Answer current. Item

Answers

Based on what you have read about wind turbines and dams, how does a generator work? A loop of ______ spins in a ______ field, producing ______ current.

Answer:

Wire

Magnetic

Electric

Explanation:

The generator works on the principle of converting mechanical energy into electrical energy.

For example in a wind turbine generator, the mechanical energy is the wind that pushes the blades of the turbine directly that leads to conversion of this it's linear motion to the rotary motion required to make rotor of the generator to spin. Finally, the harder the wind pushes, the more the mechanical energy applied and consequently, the more electrical energy can be generated.

Now, all generators work because of the effect of the magnetic field moving past an electrical coil.

Thus, the movement of a magnet across a single loop of wire produces a voltage that is induced within the wire loop as a result of the magnetic field produced by the magnet.

As a voltage is induced across the wire loop, electrons begin to flow around the loop thereby generating electric current.

Solve for final product and show work for Na + NO3 ?

Answers

Sodium (Na) is atomic number 11, so it has 1 valency

While Nitrate (NO₃) has valency 1

Sodium has an extra electron while nitrate needs an extra electron, sodium gives its electron to nitrate and forms a bond,

NaNO₃ (Sodium nitrate)

Happy to help :)

21. What is an electron energy level?

Answers

Electron is negative
Proton is positive
Neutron is just nothing really

A gas has a volume of 900.0 mL at 35.0°C and 400.0 atm. What would the volume of the gas be at 258 °C and 700.0 atm of pressure?

Answers

Answer:

887 ML

Explanation:

yup

What would happen to the position of the equilibrium when the following
changes are made to the equilibrium system below?
250 (8) - 250_(g) + O2(g)
Sulfur trioxide is removed from the system.

A. Shifts Left
B.Shifts Right

Answers

A because when it removes it shifts left
The answer will most likely be a .
Hopefully it’s right .

A bag contains 3 red marbles, 3 blue marbles and 1 green if a marble is drawing from the bag at random what is the chance of the marble being blue

Answers

Answer:

three-seventh

Explanation:

Radioactivity is the -------------- disintegration of an atomic nucleus that releases energy to become stable *

a. Extraordinary

b. Normal

c. Ordinary

d. Spontaneous​

Answers

Spontaneous, as it happens randomly

Answer:

The answer is spontaneous.

A homogenerous mixture is a mixture where you can see the different parts.
True
or
False

Answers

Answer:

the nwser is false

Explanation:

Its false becuase Homomogeneous means "One" and if you can see different parts of it then its not homogeneous. hope this helps!

Gold can be pounded out to make a foil only a few atoms thick because of
A. Metallic Bonds
B. Ionic Bonds
C. Valence Bonds
D. Covalent Bonds

Answers

Answer:

A. Metallic Bonds

Explanation:

Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons and positively charged metal ions.

Why aren’t dominant genes ALWAYS more common?

Answers

Answer:

selective breeding

Explanation:

Example:  pretend that rabbits can only be brown or black and black is dominant. If only the brown rabbits reproduce it will eventually be more common    Hope this helps

What causes circulation of air

Answers

The circulation of wind in the atmosphere is driven by the rotation of the earth and the incoming energy from the sun. Wind circulates in each hemisphere in three distinct cells which help transport energy and heat from the equator to the poles. The winds are driven by the energy from the sun at the surface as warm air rises and colder air sinks.

Answer: The circulation of wind in the atmosphere is driven by the rotation of the earth and the incoming energy from the sun. Wind circulates in each hemisphere in three distinct cells which help transport energy and heat from the equator to the poles.

Explanation:

Which led to the formation of oceans after water on Earth’s surface evaporated?

Answers

Answer:

Explanation:

En tiempos de la formación de la Tierra, el planeta se encontraba a una elevada temperatura, por lo que no le resultaba posible retener ningún tipo de atmósfera. La ausencia de nubes de vapor de agua y océanos en la tierra primigenia era causa directa de su temperatura, ya que el agua se encontraba combinada con los materiales rocosos.

The sun released a strong burst of water vapor. As Earth cooled, water in the atmosphere condensed.

The question and options are below {the attachment}
I don't have much time, so please help me!
TIME REMAINING
36:00

Answers

Answer:

i think its B

Explanation:

can anyone help me with the last question.
it whould help me a ton

Answers

For the very last question you would first divide 8,900 by 12 and the number you get will be the answer. You should get 741.66

How many CARBON atoms are present in 2C3H8O3 ?

Answers

Answer:

b

Explanation:

A gas occupies occupies a volume of 0.2 L at 76 mmHg. What volume will the gas occupy at 760 mmHg?

Answers

Answer:

0.02

Explanation:

To solve this problem we use the Boyle's law equation

P1V1 = P2V2

P1 = 76mmHg

V1 = 0.2L

P2 = 760mmHg

V2 = unknown

Substituting values into the equation;

76mmHg * 0.2L = 760mmHg * v2

15.2 = 760V2

Divide through by 760 to get v2

15.2/760 = 0.02

So the gas will occupy a volume of 0.02 at 760mmHg

how are heat, temperature, and thermal energy related?​

Answers

Answer:

Heat, temperature, and thermal energy are related because they all work with each other.

Explanation:

First of all, everything start's off with temperature. It starts off low. But when heat is added to it, it rises and the temperature goes up. This causes thermal energy to the objects touching it. The hotter it is the faster the particles move and the more kinetic energy they have.  

what happens to the electrons in an ionic bond and a covalent bond?

Answers

Answer:

In ionic bonding, atoms transfer electrons to each other. Ionic bonds require at least one electron donor and one electron acceptor. In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.

Answer:

In ionic bonding,

atoms transfer

electrons to each

other. Ionic bonds

require at least one electron

donor and one electron

acceptor. In contrast, atoms

with the same electronegativity

share electrons in covalent

bonds, because neither atom

preferentially attracts or repels

the shared electrons.

what caused light to appear bent when it refracts ?

Answers

Answer:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light enters a more dense substance (higher refractive index), it 'bends' more towards the normal line.

Answer: I think C. When light enters a different medium, it travels at a different speed.

Explanation: sorry if I’m wrong!

HElPpp AsAPp I’ll mark you as brainlister!!

Answers

A. There is no extra information

Gasoline contains chemical potential energy. When you place gasoline in a car, you use up the gasoline and have to refill your gas
tank. How can a teacher state that energy can neither be created nor destroyed in light of this observation?
A)
The teacher is only talking about chemical reactions.
B)
The teacher is stating a theory and not an actual law.
0)
This is an exception to the law of conservation of energy.
D
The energy must be converted into different forms like motion and heat

Answers

i thinks the answer is B

I need more help on the other chart please
Calculating pH
see chart below

Answers

Answer:

2, acidic, 5, acidic

Explanation:

pH = -log[H+], where [H+] is the concentration of H+.

Using the data in the table, you can calculate the pH:

-log[1e-2] = 2

-log[1e-5] = 5

To find out whether it is acidic, basic, or neutral, use a pH scale. Anything less than 7 is acidic, anything over is basic. Knowing this, both (except the middle, which you did correctly) are acidic.

;)

The large number before a molecule in a chemical formula is called a _______________.

O subscript
O coefficient
O equation

Answers

the answer is coefficient

Answer:

Subscript

Explanation:

The little number you see to the right of the symbol for an element is called a subscript. That number indicates the number of atoms of that element present in the compound. When balancing an equation, you can change the coefficients but not the subscripts.

hope this helps! if not, it's got to be coefficient or equation

Ture or False: air has its components spread evenly, so it is considered a homogenous mixture.

Answers

Answer:

True.

Explanation:

The composition of a mixture is varied by altering the proportions of its constituents. True. Solutions are heterogeneous since the ratio of solute to solvent does not remain the same throughout the solution.

can someone list these in correct order? from least brigehst to brightest?​

Answers

Polaris -least brightest
Pluto
Venus
Moon
Sun - most brightest

C + O2 + CO2
What type of reaction occurs when carbon dioxide is formed from carbon and oxygen?

Answers

Answer:

combustion reaction.

Explanation:

It is a combination reaction as carbon combines with oxygen to form carbon dioxide. It is a combustion reaction as carbon is burnt in the presence of oxygen.

When liquid H2O is chemically separated in a scientific investigation it forms H2 gas and O2 gas. If the number of hydrogen and oxygen molecules does not change through the equation, then the mass will
Select one:
decrease from reactants to products.

stay the same from reactants to products.

increase from products to reactants.

increase from reactants to products.

Answers

stay the same. this is the law of conservation

100 cm3 of the copper sulfate solution contains 1.8 g of copper sulfate.
Calculate the mass of copper sulfate in 25 cm of this copper sulfate solution.

Answers

Answer:

The mass of copper sulfate in 25 cm³ of the copper sulfate solution is 0.45 g

Explanation:

The given parameters are;

The volume of the copper sulfate solution = 100 cm³

The mass of the copper sulfate in the solution = 1.8 g

Therefore, the mass of copper sulfate in 25 cm³ of the solution is given as follows;

The mass of copper sulfate in 100 cm³ of the solution = 1.8 g

The mass of copper sulfate in 1 cm³ of the solution  = 1.8 g/100 = 0.018 g

Therefore;

The mass of copper sulfate in 25 × 1 = 25 cm³ of the solution, m  = 25×0.018 g = 0.45 g

∴ The mass of copper sulfate in 25 cm³ of the solution, m = 0.45 g

The heart, arteries, and veins are all part of what body system?

Answers

Answer:

The circulatory system.

Explanation:

All of them are in charge of pumping blood and oxygen throughout the body, which is the job of the circulatory system.

How do neutral metal atoms form ions?​

Answers

Answer:

Neutral atoms can be turned into positively charged ions by removing one or more electrons. ... Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons. By adding one more electron we get a negatively charged Cl- ion with a net charge of -1.

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