横向
1
Smallest unit of an element
3
Absolute temperature scale unit
4
Fourth state of matter
6
Compound containing oxygen
纵向
2
Force that attracts objects together
4
Positive particle in nucleus
5
Our home planet
7
Preserved remains of ancient life
Smallest unit of an element
Absolute temperature scale unit
Fourth state of matter
Compound containing oxygen
Force that attracts objects together
Positive particle in nucleus
Our home planet
Preserved remains of ancient life