Subatomic Particles

Front

What is the relative mass of a proton or neutron?

Back

1 amu

Front

How many electrons does a neutral atom of sodium have if it has 11 protons?

Back

11 electrons

Front

What is the number of protons in phosphorus-31?

Back

15 protons

Front

How many electrons are present in an atom of Krypton?

Back

36 electrons

Front

Where are protons and neutrons located in an atom?

Back

In the nucleus

Front

What is the charge of a proton?

Back

Positive charge

Front

What is the charge of a neutron?

Back

No charge (neutral)

Front

What is the charge of an electron?

Back

Negative charge

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.