Across
1
Center of an atom or cell
4
Gas form of a liquid
5
Reddish electrical conductor
8
Basic unit of life
10
Glass that splits light into spectrum
11
Solid with repeating atomic pattern
Down
2
Chemical element in table salt
3
Blocking of light by a celestial body
4
Hottest planet in solar system
6
Smallest unit of an element
7
Curved glass that refracts light
9
Preserved remains of ancient life