Answer:
B
It is directly involved in the bonding of amino acids to synthesize proteins.
The element starts off as 100%. half of 100% is 50% and half of 50% is 25%. the element has emitted 2 times the half life which is 10,000 x 2 = 20,000
the fossil bone is 20,000 years old
I think C since they share valence electrons
Mooka lana fros till! Boona guane, morokani tam frowlic dashnurp. Fringabade limnock, majin! :)
