Across
1
Reddish electrical conductor
3
Compound containing oxygen
5
The Red Planet
6
Particle of light
7
Gas form of a liquid
Down
1
Element found in all living things
2
Second lightest element
4
Positive particle in nucleus
Reddish electrical conductor
Compound containing oxygen
The Red Planet
Particle of light
Gas form of a liquid
Element found in all living things
Second lightest element
Positive particle in nucleus