Question

in 2nd group most of the Be+2 compounds are covalent while other element of this group are ionic.. explain

Answer 1

electronegativity differences between two atoms determine whether a bond is non-polar, polar, or ionic. electronegativity decreases down a group, so the group 2 bonds get more and more polar as you go down the group

Answer 2

then Na+ should also form covalent

Answer 3

sodium has an even lower electronegativity than beryllium does. When the difference in EN is >1.7, we generally consider the bond to be completely ionic.

Answer 4

ur concepts are strong.. :)

Answer 5

i hope so, i teach them ;-) thanks~

Answer 6

u r a teacher??

Answer 7

say na plz can u teach me silicates i m worst in that topic it is the weakest point of mine in whole chemistry plzz..

Answer 8

I don't know much about silicates, sorry.

Answer 9

I would think its fajan's rule.Samller the cation more polarization and more covalency in the molecule.