Question

1. how many electron shells does n have? a. 1 b. 2 c. 3 d. 4 10. how many electron shells does o have? a. 1 b. 2 c. 3 d. 4 11. how many neutrons does n have? your answer 12. how many neutrons does c have? your answer 13. how many neutrons does o have? your answer

Explanation:

Step1: Recall atomic number of N

Nitrogen (N) has atomic number 7. Electrons are arranged in shells. The first shell can hold 2 electrons and the second shell starts to fill after the first is full. For N with 7 electrons, 2 go in the first shell and 5 in the second shell, so it has 2 electron - shells.

Step2: Recall atomic number of O

Oxygen (O) has atomic number 8. 2 electrons go in the first shell and 6 in the second shell, so it has 2 electron - shells.

Step3: Recall neutron number for N

The most common isotope of nitrogen has mass number 14 and atomic number 7. Neutron number = mass number - atomic number. So, neutron number for N = 14 - 7=7.

Step4: Recall neutron number for C

The most common isotope of carbon has mass number 12 and atomic number 6. Neutron number = mass number - atomic number. So, neutron number for C = 12 - 6 = 6.

Step5: Recall neutron number for O

The most common isotope of oxygen has mass number 16 and atomic number 8. Neutron number = mass number - atomic number. So, neutron number for O = 16 - 8=8.

Answer:

1. B. 2
2. B. 2
3. 7
4. 6
5. 8