Front

How many electrons are in Aluminium?

Back

13

Front

How many neutrons are in Phosphorus?

Back

16

Front

What is a valence electron?

Back

Electrons in the outermost energy level.

Front

How many protons are in Sodium?

Back

11

Front

What is the name of this element? (Ne)

Back

Neon

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.

Front

What do the rows in the periodic table represent?

Back

The number of electron shells.

Front

What do the columns in the periodic table represent?

Back

Elements with similar chemical properties and the same number of valence electrons.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.