Across
1
Absolute temperature scale unit
2
Unit of force
4
Solid with repeating atomic pattern
5
Reddish electrical conductor
10
Positive particle in nucleus
11
Naturally occurring inorganic solid
12
Gas essential for breathing
Down
2
Center of an atom or cell
3
Biological catalyst
6
Amplified beam of light
7
Unit of power
8
Magnetic metallic element
9
Glass that splits light into spectrum