Question

When calculating total valence electrons, extra electron pairs are added to which atom?
A. Central
B. Inside
C. Outside
D. Upper

Answer 1

Arrange the other atoms around the central atom, in accord with the normal valences of the atoms. That is, do not place more atoms around a central one than it normally can bond to.
http://chemistry.umeche.maine.edu/CHY251/therules.html

Answer 2

Consult the molecular formula and sum up all the valence electrons from the separate atoms. The Group number in the Periodic Table = the number of valence electrons for an atom.

Answer 3

Hydrogen never is the central atom. It forms only one bond, so it must generally be in the outer layer of atoms. Therefore, place hydrogen atoms last.

Answer 4

What do u think the answer is?

Answer 5

Electrons have no definite position in atoms

Answer 6

so.. im confused.

Answer 7

The rest of the electrons just go and fill all the other atoms' octets?

Answer 8

That's correct

Answer 9

@cmvijay just gave u the right answer :)

Answer 10

what do u mean by xtra electron pairs

Answer 11

mean the core shell electrons :)

Answer 12

Here is an example of lewis atom structure, let's use carbon for example.

Answer 13

as u can see in ammonia the N bears the lone pair of extra electrons :)its central atom

Answer 14

oooh so its A. Central?

Answer 15

yaaa :)

Answer 16

THANKS ^_^

Answer 17

ur welcome :)