Across
1
Basic unit of life
3
Precious yellow metallic element
4
Hottest planet in solar system
5
Naturally occurring inorganic solid
9
Measure of matter in an object
Down
1
Solid with repeating atomic pattern
2
Fourth state of matter
6
Center of an atom or cell
7
Nerve cell in the brain
8
Reddish electrical conductor
10
Absolute temperature scale unit