Answer: noble gasses
Explanation: zoom on on the red section and look at the key for what red means.
The closer you get to the equator the warmest you will be. 10 degrees north is warmer than 80 degrees north, because 10 degrees north is closer to the equator. I don't know if that was helpful or not but, I tried to answer as best as I could.
I’m pretty positive the answer is True
Number 13 is D. Mendeleev. He was a Russian chemist and inventor who formulated the periodic table.