Across
1
Center of an atom or cell
5
Reddish electrical conductor
6
Solid with repeating atomic pattern
7
Smallest unit of an element
10
Precious yellow metallic element
Down
2
Absolute temperature scale unit
3
Curved glass that refracts light
4
Chemical element in table salt
5
Element found in all living things
8
Path of a planet around the sun
9
Group of similar cells