Rubber is the only insulator in the answer options. The others are conductors, so you know that the rubber tire is the answer.
Answer:
B. Cl.
Explanation:
These are Group 7 elements whose reactivity reduces as you go down the group. Chlorine has a smaller atoms than the rest and has a stronger tendency to grab an electron in its valency shell. This is because its nucleus is closer to the outer electrons than the other elements.
The correct answer would be Sodium! I look up the flash card and got this! I hope this helps and I hope you have an amazing day!