Question

which of the following will become a negative ion when it bonds with another atom? select one: a. a b. b c. c d. d

Explanation:

Step1: Count protons and electrons for A

Protons = 7, Electrons = 2 + 5 = 7. Valence electrons = 5 (needs 3 more to fill shell).

Step2: Count protons and electrons for B

Protons = 4, Electrons = 2 + 2 = 4. Valence electrons = 2 (tends to lose 2).

Step3: Count protons and electrons for C

Protons = 5, Electrons = 2 + 3 = 5. Valence electrons = 3 (tends to lose 3).

Step4: Count protons and electrons for D

Protons = 3, Electrons = 2 + 1 = 3. Valence electrons = 1 (tends to lose 1).

Step5: Identify atom gaining electrons

Atom A has 5 valence electrons, so it gains 3 electrons to form a negative ion (anion) when bonding.

Answer:

a. A