Question

determine the components of the atomic symbol using the number of protons, neutrons and electrons. 14 numeric 1 point what is the atoms mass number (a)? answer p+ = 20 n0 = 21 e- = 18

Explanation:

Step1: Recall mass - number formula

The mass number (A) of an atom is the sum of the number of protons ($p^+$) and neutrons ($n^0$).

Step2: Calculate the mass number

Given $p^+=20$ and $n^0 = 21$, then $A=p^++n^0=20 + 21$.
$A=41$

Answer:

41