Chemistry Fall Semester Review Part 2

Front

What is the horizontal row on the periodic table called?

Back

Period

Front

Which atom has the largest atomic radius: potassium, rubidium, sodium, or cesium?

Back

Cesium

Front

Which group of the periodic table is composed of inert (not reactive) gases?

Back

Noble gases

Front

What are the rows on the periodic table called?

Back

Periods

Front

What does the period number indicate about an element?

Back

The number of energy levels.

Front

What are the vertical columns on the periodic table called?

Back

Groups or families.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of valence electrons?

Back

They determine how an element reacts chemically.

Front

What are alkali metals?

Back

The group of elements in Group 1 of the periodic table, highly reactive.

Front

What are halogens?

Back

The group of elements in Group 17 of the periodic table, very reactive nonmetals.