Across
1
Unit of electric potential
3
Gas essential for breathing
5
Positive particle in nucleus
8
Precious yellow metallic element
11
Compound containing oxygen
12
Magnetic metallic element
Down
2
Icy body with a tail near the sun
4
Unit of force
6
Path of a planet around the sun
7
Push or pull on an object
9
Ball of burning gas in space
10
Basic unit of life
13
Particle of light