Which of the following is the valency of carbon in ethene?

The valency of carbon in ethene is four. Carbon has an atomic number of 6 with four electrons in its outermost shell, meaning it always forms four covalent bonds to achieve a stable electronic configuration. In this molecule, the two carbon atoms are linked by a double bond (C=C), and each carbon is also bonded to two hydrogen atoms, satisfying the requirement of four bonds per carbon. The carbon atoms in ethene are sp2 hybridised, which results in a planar structure with bond angles of approximately 120°.