Groups and Periods

Front

What are elements in a group known for?

Back

Elements in a group have similar properties.

Front

What is a halogen?

Back

A halogen is a nonmetal that forms salts when chemically combined with metals.

Front

Which elements are considered halogens?

Back

Fluorine, Chlorine, Bromine, Iodine, and Astatine.

Front

What does the period number indicate in the periodic table?

Back

The period number indicates the number of energy levels in an atom.

Front

What are the horizontal rows in the periodic table called?

Back

Periods.

Front

What are the vertical columns in the periodic table called?

Back

Groups.

Front

How many groups are there in the periodic table?

Back

There are 18 groups in the periodic table.

Front

What is the significance of valence electrons?

Back

Valence electrons determine how an element reacts chemically.

Front

What do elements in the same group have in common?

Back

They have the same number of valence electrons.

Front

What is the difference between a group and a period?

Back

A group is a column of elements with similar properties, while a period is a row of elements that have the same number of energy levels.