Subatomic Particles

Front

What is the charge of a proton?

Back

Positive

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

How many protons does an atom of Chlorine (Cl) have if its atomic number is 17?

Back

17 protons.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

If an atom has 3 electrons, how many protons does it have?

Back

It has 3 protons (in a neutral atom, protons = electrons).

Front

What is the mass number of Potassium (K) if it has 20 neutrons and 19 protons?

Back

39 (19 protons + 20 neutrons).

Front

How many electrons does an atom with an atomic number of 3 have?

Back

3 electrons.

Front

What is the charge of a neutron?

Back

No charge (neutral).

Front

What is the relationship between atomic number and mass number?

Back

Mass number = Atomic number + Number of neutrons.

Front

If an element has a mass number of 7 and 3 protons, how many neutrons does it have?

Back

4 neutrons (7 - 3 = 4).