Across
1
Precious yellow metallic element
4
Smallest unit of an element
6
Nerve cell in the brain
8
Solid with repeating atomic pattern
10
Gas form of a liquid
Down
2
Tectonic landmass section
3
Gas essential for breathing
5
Molten rock beneath Earth surface
7
Unit of energy
8
Reddish electrical conductor
9
Glass that splits light into spectrum