Easy
middle
Hard
100
The hydrogen atomic number
What is 1
100
Hg is
What is mercury
100
this can help when your in the woods and you dont have clean water but you by a river
What is Iodine
200
The helium atomic number
What is 2
200
Mg is
What is magnesium
200
this is one of the of things that makes air
What is oxygen
300
Fe is
What is Iron
300
na is
What is sodium
300
the atomic number for chlorine is
What is 17
400
C is
What is Carbon
400
zn is
What is zinc
400
you can use sillicon for
What is they are used in sealants, adhesives, lubricants, medical applications, cooking utensils
500
Au is
What is silver
500
Ne is
What is neon
500
the atomic for iron is
What is 26
M
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