Hybridization of central atom in Be2C

Explanation:
Be2C is a diatomic molecule in which two Be atoms are covalently bonded to one C atom. In Be2C, the central atom is C and the valence shell electronic configuration of C is 2s22p2.

The hybridization of an atom is defined as the mixing of atomic orbitals to form hybrid orbitals that have different shapes and energies than the original atomic orbitals. The hybrid orbitals are used to explain the geometry of molecules and the bonding between atoms.

To determine the hybridization of the central atom in Be2C, we need to first determine the number of hybrid orbitals needed to accommodate the electron pairs around the central atom.

In Be2C, the C atom is surrounded by two electron pairs (one from each Be atom) and therefore needs two hybrid orbitals. The type of hybridization that occurs depends on the number and type of atomic orbitals that are mixed.

In C, the 2s and three 2p orbitals can hybridize to form four sp3 hybrid orbitals, three sp2 hybrid orbitals, or two sp hybrid orbitals.

However, in Be2C, only two hybrid orbitals are needed, and therefore only two atomic orbitals can hybridize. The most likely hybridization is sp hybridization, which involves mixing the 2s and one 2p orbital.

Therefore, the correct answer is option "A" (sp).

Conclusion:
The hybridization of the central atom in Be2C is sp.