Question

indicate the number of protons and neutron in boron - 11. protons 6 neutrons 6 question 2 indicate the number of protons and neutrons in phosphorus - 31. protons 16 neutrons 15

Explanation:

Step1: Recall atomic number concept

The atomic number of an element is equal to the number of protons. Boron has an atomic number of 5. Phosphorus has an atomic number of 15.

Step2: Calculate neutrons

The mass - number is the sum of protons and neutrons. For boron - 11 (mass - number = 11), neutrons = 11 - 5 = 6. For phosphorus - 31 (mass - number = 31), neutrons = 31 - 15 = 16.

Answer:

For boron - 11: protons = 5, neutrons = 6
For phosphorus - 31: protons = 15, neutrons = 16