Answer:
They are averages.
Explanation:
atomic numbers on periodic tables are derived from the average value of all the isotopes of the element. So being averages they are sometimes not integers.
Answer:
True
Explanation:
There are 9 essential amino acids which cannot be made by the body and have to be obtained from food.
They are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine
74 is the answer u find it by subtracting the protons(atomic number) from atomic mas, so basically... 127-53 =74 neutrons