How many protons (p)and neutrons (n)are in an atom of ?
A)38 p, 52 n
B)38 p, 90 n
C)52 p, 38 n
D)90 p, 38 n

Question

How many protons (p)and neutrons (n)are in an atom of ?
A)38 p, 52 n 
B)38 p, 90 n 
C)52 p, 38 n 
D)90 p, 38 n

Quizplus · Accepted Answer

The atomic number of the element is 38 which means it has 38 protons. The mass number of the atom is 90 (given in the code) which is the sum of protons and neutrons. Therefore, the number of neutrons can be calculated as (90-38) which gives 52. So, the correct answer is A) 38 p, 52 n.

How Many Protons (P)and Neutrons (N)are in an Atom of