Periodic Table

Front

What is a neutron?

Back

A subatomic particle contained in the nucleus of an atom, having the same mass as a proton but no electrical charge.

Front

What do elements in a group have in common?

Back

Elements in a group have similar chemical properties.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically with other elements.

Front

What is the atomic number?

Back

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

Front

What is the mass number?

Back

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

Front

What is an electron?

Back

A subatomic particle with a negative charge that orbits the nucleus of an atom.

Front

What is a proton?

Back

A subatomic particle found in the nucleus of an atom, with a positive charge.

Front

What is a period in the periodic table?

Back

A horizontal row in the periodic table where elements have the same number of electron shells.

Front

What is a group in the periodic table?

Back

A vertical column in the periodic table where elements have the same number of valence electrons.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number and grouped by similar properties.