what is the mass number of a carbon atom which has six protons and six neutrons.\na 72\nb 18\nc 6\nd 12
what is the mass number of a carbon atom which has six protons and six neutrons.\na 72\nb 18\nc 6\nd 12
Answer
Explanation:
Step1: Recall mass - number formula
The mass number ($A$) of an atom is the sum of the number of protons ($p$) and neutrons ($n$), i.e., $A=p + n$.
Step2: Substitute given values
Given that $p = 6$ and $n=6$, then $A=6 + 6=12$.
Answer:
d. 12