In a diamond, each carbon atom is bonded to . . . . . . . . A. Five other carbon atoms B. Three other carbon atoms C. Two other carbon atoms D. Four other carbon atoms

The correct answer is: D. Four other carbon atoms

In a diamond, each carbon atom is bonded to four other carbon atoms in a tetrahedral arrangement. This means that each carbon atom is connected to four other carbon atoms by covalent bonds, which are strong bonds that form when atoms share electrons. The tetrahedral arrangement of the carbon atoms gives diamond its strength and hardness.

Option A is incorrect because each carbon atom is bonded to four other carbon atoms, not five.

Option B is incorrect because each carbon atom is bonded to four other carbon atoms, not three.

Option C is incorrect because each carbon atom is bonded to four other carbon atoms, not two.