横向
1
Smallest unit of an element
3
Positive particle in nucleus
6
Form of thermal energy
7
Solid with repeating atomic pattern
8
Curved glass that refracts light
9
Mass per unit volume
纵向
2
Path of a planet around the sun
4
Blocking of light by a celestial body
5
Precious yellow metallic element
10
Substance with pH above 7