How do valence electrons in the carbon group work?

Question

I know that they act abnormally.

Answer 1

atomic number = 6
6 electrons
2 in the inner orbit
4 in the outer orbit

Valency = 4

Answer 2

There are four electrons so thecarbon atom can make either 4 four single bound as in methane CH4 , 2 single bounds and one double bound as in ethylene or a triple bound and a single bound as in acetylene HCCH

Answer 3

they have 4 in the outer shell

so they share and line up mostly

usually single bods

sometimes double

in acetalin triple bonds