横向
1
Our home planet
4
Naturally occurring inorganic solid
7
Chemical element in table salt
纵向
2
The Red Planet
3
Smallest unit of an element
5
Positive particle in nucleus
6
Precious yellow metallic element
8
Icy body with a tail near the sun
Our home planet
Naturally occurring inorganic solid
Chemical element in table salt
The Red Planet
Smallest unit of an element
Positive particle in nucleus
Precious yellow metallic element
Icy body with a tail near the sun