Periodic Table - Groups and Periods

Front

What are the two main ways the periodic table is organized?

Back

By periods (horizontal rows) and groups (vertical columns).

Front

How many periods are there in the periodic table?

Back

There are 7 periods.

Front

How many groups are there in the periodic table?

Back

There are 18 groups.

Front

What does the period number of an element indicate?

Back

It indicates the number of energy shells (or electron shells) an element has.

Front

What is a valence electron?

Back

A valence electron is an electron in the outermost shell of an atom that can participate in chemical bonding.

Front

How many valence electrons do most elements want to have for stability?

Back

Most elements want to have 8 valence electrons for stability (octet rule).

Front

What is the difference between metals, non-metals, and metalloids?

Back

Metals are good conductors of heat and electricity, non-metals are poor conductors, and metalloids have properties of both.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number indicates the number of protons in an atom's nucleus and determines the element's identity.

Front

What is the term for elements in the same vertical column of the periodic table?

Back

They are called groups or families.

Front

What is the term for elements in the same horizontal row of the periodic table?

Back

They are called periods.