help

Ah sian SG

urgent

how many electron are shared in the covanlent bonds in a methane molecule

why is the answer 8

UltimaOnline SG

urgent

how many electron are shared in the covanlent bonds in a methane molecule

why is the answer 8

4 bonds, each bond is 2 electrons. 4 x 2 = 8.

Ah sian SG

how u know is 4 bond and 2 electron

UltimaOnline SG

how u know is 4 bond and 2 electron

Because C is in Grp IV, and to have stable octet, it must have 4 bonds. Each bond consists of 2 electrons.

Ah sian SG

i dont understand can explain

how you know that methane is in grp 4 and each bond consist of 2 electron

i thought electron can range from 2-8

Ah sian SG

and what is C

UltimaOnline SG

C is carbon. Methane is a molecule that consist of 1 carbon atom bonded to 4 hydrogen atoms.

Ah sian SG

but how you know methane is grp 4 and how u know that the bond consist of 2 electon

is it c2h4

so mr is 28 = 2.8.8.8

UltimaOnline SG

but how you know methane is grp 4 and how u know that the bond consist of 2 electon

is it c2h4

so mr is 28 = 2.8.8.8

Carbon is in Grp IV, not methane. So methane (an alkane with only 1 C) is CH4.

Ah sian SG

2.8.8.8.2

what

Ah sian SG

wait im very confuse

ch4 = 16

so 2.8.6

UltimaOnline SG

but how you know methane is grp 4 and how u know that the bond consist of 2 electon

is it c2h4

so mr is 28 = 2.8.8.8

>>> so mr is 28 = 2.8.8.8 <<<

You seem like you're writing the electron configuration.

Cl is 2.8.7

Cl- is 2.8.8

Ga is 2.8.18.3

Ga3+ is 2.8.18

Ah sian SG

4 bonds, each bond is 2 electrons. 4 x 2 = 8.

how u know is 4 bond and each bond is 2 electron

Ah sian SG

can explain

UltimaOnline SG

how u know is 4 bond and each bond is 2 electron

Because "meth" means 1 carbon atom. And all carbon atoms must have 4 bonds (at least at 'O' levels; at 'A' levels you can have carbocations and carbanions, with 3 bond pairs zero lone pairs, and 3 bond pairs 1 lone pair, respectively).

And methANE is an alkANE, and without any subtitutents (eg. tribromomethane), so you know all 4 bonds from carbon must have hydrogen atoms attached.

And all covalent bonds consist of 2 electrons each.

Garrick_3658 SG

CH4 right. So 4 hydrogen atoms bond to a carbon atom. So 4 bonds are forged, each between an atom. All 4 hydrogen atoms bond to the same carbon atom.

Since each hydrogen and carbon bond shares two electrons, 4 bonds = 8 electrons.

Try drawing out the dot and cross first. Then you'll see.

Ah sian SG

so any carbon atom = 4 bond

and each covalent bond must be 2 electron and cannot be other like 3 4 5 or 6 isit

UltimaOnline SG

so any carbon atom = 4 bond

and each covalent bond must be 2 electron and cannot be other like 3 4 5 or 6 isit

Yes, every covalent bond (in any molecule) always consists of 2 electrons.

(Ok, I'm gonna log off now. Will try to check forum tmrw morning, in case there are more last min qns.)

Ah sian SG

thanks i understand now