Im a nonmetal who is solid at room tempature has 2 letters for my symbol and mass is 79

Selenium (Se)

Explanation:

Selenium is the 34th element on the periodic table and is a reactive nonmetal. It has a molar mass of 78.971g or when rounded 79g. generally room temperature is considered 68 - 72° F or 20 - 22° C and between this range Selenium is a solid.

hope this helps :)

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying