Question

Which statement best explains how electrons form a covalent bond in a molecule?
A.
A pair of electrons splits so that each atom gets one electron.
B.
A pair of electrons belongs to two atoms at the same time.
C.
A pair of electrons is transferred from one atom to another atom.
D.
A pair of electrons moves from a lower energy level to a higher energy level.
E.
A pair of electrons drifts freely from one molecule to another.
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Answer 1

It would be B because

C, D, and E refer 2 the transfer of electrons which isnt sharing or covalent. covalent means co - valent = co - valence or where the valence electrons r shared with 2 atoms at the same time. so A is also wrong. its probs B

U GAT DIS HOMIEE

Answer 2

Answer:

B.  A pair of electrons belongs to two atoms at the same time.

Explanation:

A covalent bond forms when two atoms share two valence electrons ( see image).

Each of the atoms shown has seven valence electrons.

They can each get a stable octet by sharing one electron each.

Then, the atom on the left has eight valence electrons in its circle and so does the one on the left.

The electrons in the middle belong to both atoms at the same time.

A. is wrong. A pair of electrons does not split. Instead, the atoms share one electron each.

C. is wrong. There is no transfer of electrons from one atom to another. The transfer of electrons creates an ionic bond.

D. is wrong. The electrons do not move to a higher energy level. Those in the covalent bond are at a lower energy level than they were in the free atoms. That’s why the covalent bond forms.

E. is wrong. The electrons do not drift freely and indeed not from one molecule to another because there are no molecules until after the covalent bond has formed.