Across
1
Positive particle in nucleus
5
Measure of matter in an object
6
Substance with pH above 7
7
Hottest planet in solar system
10
Unit of heredity
Down
2
Compound containing oxygen
3
Reddish electrical conductor
4
Unit of power
8
Nerve cell in the brain
9
Center of an atom or cell
11
Tectonic landmass section