Across
1
Compound containing oxygen
4
Glass that splits light into spectrum
5
Curved glass that refracts light
7
Substance with pH below 7
8
Center of an atom or cell
12
Unit of electric potential
Down
2
Naturally occurring inorganic solid
3
Precious yellow metallic element
6
Chemical element in table salt
9
Reddish electrical conductor
10
Push or pull on an object
11
Unit of heredity