Question

which of the following models represent a compound? * 3 points a. b. c. d. a and c b and d a, b, and c all of the above

Explanation:

A compound is a substance formed when two or more different elements chemically bond together. In molecular models, different - colored spheres represent different elements.

• In option A: The two spheres are of the same color, so it represents a di - atomic molecule of an element (not a compound).
• In option B: The two spheres are of different colors, representing a molecule of a compound (e.g., if one color is hydrogen and the other is chlorine, it could be HCl).
• In option C: The two spheres are of the same color, representing a di - atomic molecule of an element (not a compound).
• In option D: The three spheres (assuming different colors) represent a molecule of a compound (e.g., if the colors represent carbon, hydrogen, and oxygen, it could be a simple organic or inorganic compound).

Answer:

B and D