Across
1
Nerve cell in the brain
4
Compound containing oxygen
5
Smallest unit of an element
8
Group of similar cells
10
Biological catalyst
11
Precious yellow metallic element
Down
2
Unit of electric potential
3
Chemical element in table salt
6
Amplified beam of light
7
Absolute temperature scale unit
9
Mass per unit volume
12
Measure of matter in an object