横向
1
Second lightest element
4
Our home planet
5
Solid with repeating atomic pattern
8
Force that attracts objects together
纵向
2
Substance with pH above 7
3
Measure of matter in an object
6
Unit of energy
7
Unit of electric potential
Second lightest element
Our home planet
Solid with repeating atomic pattern
Force that attracts objects together
Substance with pH above 7
Measure of matter in an object
Unit of energy
Unit of electric potential