Across
1
Positive particle in nucleus
3
The Red Planet
Down
2
Gas form of a liquid
4
Unit of heredity
5
Particle of light
6
Substance with pH below 7
7
Smallest unit of an element
8
Ball of burning gas in space
Positive particle in nucleus
The Red Planet
Gas form of a liquid
Unit of heredity
Particle of light
Substance with pH below 7
Smallest unit of an element
Ball of burning gas in space