Protons, Neutrons, & Electrons

Front

What is the mass number of an element?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

How many protons are in a silver atom?

Back

Silver (Ag) has 47 protons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the symbol for oxygen?

Back

The symbol for oxygen is O.

Front

How many electrons does a neutral atom of oxygen have?

Back

A neutral atom of oxygen has 8 electrons.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is the symbol for arsenic?

Back

The symbol for arsenic is As.