Question

How many neutrons are found in the nucleus of a boron-11 (B) atom?

a. 11

b. 6

c. 5

d. 4

Answer 1

The nucleus of a boron-11 (B) atom contains 6 neutrons, which is calculated by subtracting the atomic number (5) from its mass number (11).

Step-by-step explanation:

The number of neutrons found in the nucleus of a boron-11 (B) atom is the difference between the mass number (which is 11 for boron-11) and the atomic number of boron, which is 5 (since boron has 5 protons). Therefore:

1. Calculate the number of neutrons by subtracting the atomic number from the mass number: 11 - 5 = 6.

Thus, the correct answer is: b. 6 neutrons.