Across
1
Positive particle in nucleus
5
Unit of energy
7
Chemical element in table salt
9
Tectonic landmass section
11
Absolute temperature scale unit
13
Solid with repeating atomic pattern
Down
2
Reddish electrical conductor
3
Hottest planet in solar system
4
Particle of light
6
Magnetic metallic element
8
Fourth state of matter
10
Naturally occurring inorganic solid
12
Group of similar cells