Across
1
Chemical element in table salt
2
Basic unit of life
3
Curved glass that refracts light
6
Element found in all living things
7
Gas form of a liquid
Down
2
Solid with repeating atomic pattern
4
Fourth state of matter
5
Precious yellow metallic element
8
Substance with pH above 7
9
Center of an atom or cell
10
Smallest unit of an element