横向
1
Smallest unit of an element
2
Hottest planet in solar system
4
Solid with repeating atomic pattern
5
Nerve cell in the brain
纵向
2
Unit of electric potential
3
Gas essential for breathing
6
Second lightest element
7
Tectonic landmass section
Smallest unit of an element
Hottest planet in solar system
Solid with repeating atomic pattern
Nerve cell in the brain
Unit of electric potential
Gas essential for breathing
Second lightest element
Tectonic landmass section