The figure above shows the Earth at two different positions in its orbit around the Sun. Which position corresponds to summer in the Northern Hemisphere?

A.

position B

B.

position A

C.

both position A and position B

D.

neither position A nor position B

A. Position B.

Explanation:

In the summer the northern hemisphere is closer to the Sun so it's Position B.

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