Periodic Table

Front

What is a valence electron?

Back

An electron that is found in the outermost shell of an atom; it determines the atom's chemical properties.

Front

How many groups are in the periodic table?

Back

There are 18 groups in the periodic table.

Front

What do elements in the same group have in common?

Back

They have similar chemical and physical properties.

Front

What does a chemical symbol always start with?

Back

A capital letter.

Front

What is a group in the periodic table?

Back

A vertical column of elements that share chemical properties.

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties.

Front

What is an atomic number?

Back

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

Front

What is a period in the periodic table?

Back

A horizontal row of elements in the periodic table, where properties change progressively.

Front

What are noble gases?

Back

Elements in Group 18 of the periodic table that are colorless, odorless, and inert under standard conditions.

Front

What is the significance of the periodic law?

Back

The properties of elements are a periodic function of their atomic numbers.