Across
1
Biological catalyst
3
Particle of light
4
Smallest unit of an element
8
Second lightest element
9
Compound containing oxygen
10
Solid with repeating atomic pattern
Down
2
Tissue that contracts for movement
3
Glass that splits light into spectrum
5
Icy body with a tail near the sun
6
Positive particle in nucleus
7
Gas form of a liquid
11
Chemical element in table salt