Periodic Table

Front

Where are the protons and neutrons in an atom located?

Back

In the nucleus.

Front

How many neutrons does Xenon (Xe) have?

Back

77.

Front

What are the columns on the periodic table known as?

Back

Groups.

Front

How many electrons does ionic Magnesium (Mg⁺²) have?

Back

10.

Front

What is the mass number of an element?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the periodic table's rows?

Back

Rows are known as periods and indicate the energy levels of the electrons.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.