Question

What is the charge of the Carbon ion 4+ or -4?

Answer 1

carbon atom has 4 electrons in its valence shell or its outermost shell. carbon can lose or gain 4 electrons in order to complete its octet. it shares its valence electrons with other atoms and forms covalent bonds. that's why, its charge is 4⁺.

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Answer 2

HI there !

Carbon :-
The atomic number of this element is 6
No : of protons in an atom is equal to the atomic no:.
Hence , 
No : of protons  = 6

Also ,
No: of electrons = No : of protons  = 6

Here , the electronic configuration of carbon is :

2 , 4

There are 4 electrons in its valence shell.
The total no: of electrons needed in the second shell is 8.
But , as the electrons here are only 4 , it needs to lose electrons to make it self stable.
Hence , its charge is +4

Also it can share it electrons with other elements.
Hence , in this case , its valency is -4

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