3 years ago

How many neutrons does element X have if its atomic number is 21 and its mass number is 95?

Chemistry

1 answer:

Softa [21]3 years ago

3 0

Atomic # = #of Protons(21)
Mass #= #of neutrons and protons(95)
Neutrons=74

You might be interested in

Explain how a heater warms the air in a room, including the words density, volume, and temperature in your explanation

seropon [69]

Answer:

Explanation:

Convection currents are created when the air above your radiator heats and then cools and is then heated again. This process happens continuously whilst you have your heating on and the current moves the heat around the room making it nice and warm and toasty.

8 0

3 years ago

What do we mean by basic MgO?

aliina [53]

Answer:

Magnesium oxide is a simple basic oxide, because it contains oxide ions. It reacts with water to form magnesium hydroxide which is a base.

5 0

3 years ago

Which statement describes a chemical property of sodium

Alenkasestr [34]

Answer:

Option b is show the chemical property of sodium....

4 0

3 years ago

When light mass nuclei combine to form a heavier more stable nucleus this is called

n200080 [17]

Answer:

Nuclear fusion

Explanation:

Science

4 0

3 years ago

A gas at a pressure of 360 torrs and a volume of 750 ml. If the pressure becomes 1.5 atm what is the new volume?

r-ruslan [8.4K]

Answer:

V₂ = 236.84 mL

Explanation:

The relation between pressure and volume is inverse.

We can write it as follows :

$P_1V_1=P_2V_2$

We have,

P₁ = 360 torrs, V₁ = 750 mL, P₂ = 1.5 atm = 1140 torr.

So,

$V_2=\dfrac{P_1V_1}{P_2}\\\\V_2=\dfrac{360\times 750}{1140}\\\\V_2=236.84\ mL$

So, the new volume of the gas is 236.84 mL.

4 0

3 years ago