-3 is the answer your looking for
If you could explain what “merkels” are, the question would be more clear.
Answer: The number of protons plus the number of neutrons equals the atomic mass.
Explanation:
Atomic mass is defined as total number of protons and neutrons in the atom.
It is an average mass of an atom.
It is expressed in atomic mass unit that is a.m.u.
It is denoted with symbol 'A'.
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This question is confusing to me.