First of all this is not Carbon's valency, it is electronic configuration or arrangement of electrons around nucleus.
Electron filling takes place by Aufbau principle.
Explanation: Electrons around an atom are arranged in shells( denoted by n) numbered 1, 2, 3, and so on. Each of these shells is further divided into s,p,d,f subshells(denoted by l).
It is known that electrons in a subshell have same energy. Electron filling occurs 1st in subshells of lower energy and higher energy subshell is filled only after the lower subshell is completely filled (Aufbau principle). Subshell whose n+l sum is less has lower energy. So here 2s(n+l=2) shell is lower to 2p(n+l=3), and 2s can have 2 electrons so after 2s is filled 2 electrons left go to 2p subshell.
Valency of carbon is 4. It remains 4 in ethane too.
The Valency of carbon in any molecule is ALWAYS '4' . So in methane (CH4) it is '4' In H2C=CH2 is is still '4' In CH3-CH3 it is still '4'.
kekule in 1865.
Is four as carbon has 4 valency .
-4 in carbides 4 in methane
The combining power of carbon is 4. This means that each carbon atom can form 4 bonds.
Valency of carbon is 4. It remains 4 in ethane too.
Valency of carbon is 4. It remains 4 in ethane too.
when carbon is not in exited state it has two valency to form the bond. But when it is exited it has four unpaired of electrons. So therefore carbon has a four valency and can form four bonds.
4
The are 24 valence electrons in a carbonate ion. http://www.800mainstreet.com/5/0005-006b-lewis.html
The Valency of carbon in any molecule is ALWAYS '4' . So in methane (CH4) it is '4' In H2C=CH2 is is still '4' In CH3-CH3 it is still '4'.
i think 4 is the valency of tetrachloride
kekule in 1865.
S = +6 valency O = -2 valency
Who Knows? :) O.o
Is four as carbon has 4 valency .