Across
1
Magnetic metallic element
3
Fourth state of matter
4
Compound containing oxygen
5
Unit of electric potential
6
Path of a planet around the sun
7
Center of an atom or cell
10
Precious yellow metallic element
Down
2
Group of similar cells
3
Positive particle in nucleus
8
Icy body with a tail near the sun
9
Curved glass that refracts light