Question

1.Write the electron configuration of calcium 20, Chlorine 17, and Oxygen 8 2. Flourine has 10 neutrons and 9 protons. Calculate the number of electrons and nucleons 3. Nitrogen has 15 nucleons and 7 protons. How many electrons nitrogen has? How many neutrons nitrogen has?

Answer 1

Calcium, Chlorine, and Oxygen have the electron configurations of 1s²2s²2p⁶3s²3p⁶4s², 1s²2s²2p⁶3s²3p⁵, and 1s²2s²2p⁴ respectively. A neutral fluorine atom with 9 protons has 9 electrons and 19 nucleons. Neutral nitrogen with 7 protons has 7 electrons and 8 neutrons.

Step-by-step explanation:

The electron configurations for the elements Calcium (Ca), Chlorine (Cl), and Oxygen (O) are as follows:

• Calcium (atomic number 20): 1s²2s²2p⁶3s²3p⁶4s²
• Chlorine (atomic number 17): 1s²2s²2p⁶3s²3p⁵
• Oxygen (atomic number 8): 1s²2s²2p⁴

Regarding the question on Fluorine, a fluorine atom with 10 neutrons and 9 protons is a neutral atom so it will have 9 electrons, and the total number of nucleons (protons + neutrons) will be 19 nucleons.

For Nitrogen with 15 nucleons and 7 protons, to determine its electrons and neutrons:

• Number of electrons: Since Nitrogen is a neutral atom, it will have 7 electrons.
• Number of neutrons: To find the neutrons, subtract the number of protons from the nucleons, so it’s 15 nucleons - 7 protons, which equals 8 neutrons.