横向
1
Gas essential for breathing
5
Ball of burning gas in space
6
Substance with pH above 7
7
Second lightest element
纵向
2
Chemical element in table salt
3
Blocking of light by a celestial body
4
Solid with repeating atomic pattern
7
Form of thermal energy
8
Our home planet
9
Force that attracts objects together
10
Positive particle in nucleus