Across
1
Center of an atom or cell
6
Unit of force
7
Unit of electric potential
8
Second lightest element
10
The Red Planet
12
Precious yellow metallic element
14
Tectonic landmass section
Down
2
Disturbance that transfers energy
3
Ball of burning gas in space
4
Positive particle in nucleus
5
Solid with repeating atomic pattern
9
Compound containing oxygen
11
Chemical element in table salt
13
Unit of energy
15
Tissue that contracts for movement