What kinds of shapes can carbon based molecules form?

Answer/Explanation:

Carbon based molecules tend to form in chain like patterns. So, carbon molecules could/would form a chain that branches out, a chain that travels in a straight or constant direction, and a chain that connects into a loop style.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

the answer is definitely c.