atoms and the periodic table

Front

What is an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What charge does a proton have?

Back

Positive charge.

Front

What charge does a neutron have?

Back

No charge (neutral).

Front

What charge does an electron have?

Back

Negative charge.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.

Front

What is the mass number?

Back

The total number of protons and neutrons in an atom's nucleus.

Front

Where are metals located on the periodic table?

Back

On the left side and in the center.

Front

What are alkali metals?

Back

The group of metals in group 1 of the periodic table, known for being highly reactive.