Periodic Table (AP)

Front

What are metalloids (semimetals)?

Back

An element that has both metallic and nonmetallic properties.

Front

What is atomic mass equal to?

Back

The number of protons and neutrons.

Front

Which element is a halogen?

Back

Chlorine.

Front

What are the vertical columns on the periodic table called?

Back

Groups.

Front

Which family of elements does not combine with other elements unless under special conditions in a laboratory?

Back

Noble gases.

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 are alkali metals?

Back

Elements found in group one of the periodic table; they are highly reactive.

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 atomic number?

Back

It represents the number of protons in the nucleus of an atom and determines the element's identity.

Front

What are periods in the periodic table?

Back

Horizontal rows in the periodic table that indicate the number of electron shells an atom has.