横向
1
Center of an atom or cell
3
Particle of light
5
Unit of energy
8
Glass that splits light into spectrum
9
Hottest planet in solar system
10
Smallest unit of an element
纵向
2
Second lightest element
4
Form of thermal energy
6
Element found in all living things
7
Group of similar cells
9
Unit of electric potential
11
The Red Planet