Jul 15, 2010 #1 L LinBin New member Joined Jul 15, 2010 Messages 1 Reaction score 0 Points 1 i am confused because it is almost as though the density increases going down the groups, but in 2A the density decreases and then increases. I just don't see the 'trend' and also why does this trend occur?
i am confused because it is almost as though the density increases going down the groups, but in 2A the density decreases and then increases. I just don't see the 'trend' and also why does this trend occur?