Question

Word bank: period, group, valence electrons, energy levels, metals, noble gases
1. A vertical column on the Periodic Table is called a _____
2. Elements in the same horizontal row, or ---
-_, have the same number of electron shells.
3. Elements in the same group have similar chemical properties because they have the same number of
--
4. The number of
_ an atom has is determined by the period it belongs to.
5. Most of the elements on the Periodic Table are classified as
6. The .
are found in Group 18 and are very stable because their outer shell is full.

Answer 1

1. group
2. period
3. valence electrons
4. energy levels
5. metals
6. noble gases