Element X is a solid metal with two valence electrons. Where would you place element X on the periodic table?

A. In family/group 1

B. In family/group 2

C. In family/group 12

D. In family/group 13

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)