multiple choice question\na certain atom of boron has 5 protons and 6 neutrons. what is its mass number?\no…
multiple choice question\na certain atom of boron has 5 protons and 6 neutrons. what is its mass number?\no 5\no 1\no 11\no 6
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 $p = 5$ and $n=6$, then $A=5 + 6$. $A = 11$
Answer:
C. 11