|
|
2
|
A fixed amount of energy that a system like an atom can have
|
3
|
Vertical Columns on the peiodic table
|
5
|
There are only 7 of these types of elements on the periodic table
|
6
|
Last group on the periodic table
|
7
|
Group 2 of the periodic table
|
8
|
Types of metals in the F block
|
12
|
Group 17 of the periodic table
|
13
|
Electrons in the outer shell of an atom
|
14
|
First group of the periodic table
|
15
|
A positively charged ion
|
18
|
Types of metals found in the D block
|
|