Answer:
Liquid
Explanation:
had this ln a test and got it right
Answer:
Because it gives them a full valence shell.
Explanation:
They represent elements by using symbols
Rris is how u right it Mg=? Because it ask u a question and then you put the equal sign and then you put the question mark because you don't know it yet
N -3
Ba +2
Sr +2
F -1
I -1
Ca +2
Mg +2
S -2
S -2
Al +3
//
Ba3N2
SrF2
CaI2
MgS
Al2S3
//
I don't really understand 2.