Question

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

The electron configurations of calcium, chlorine, and oxygen are 1s²2s²2p⁶3s²3p⁶4s², 1s²2s²2p⁶3s²3p⁵, and 1s²2s²2p⁴, respectively. Fluorine has 9 electrons, and nitrogen has 7 electrons and 8 neutrons.

Step-by-step explanation:

The electron configuration of calcium (20 electrons) is 1s²2s²2p⁶3s²3p⁶4s². Chlorine (17 electrons) has the electron configuration of 1s²2s²2p⁶3s²3p⁵. Oxygen (8 electrons) has the electron configuration of 1s²2s²2p⁴.

Fluorine has 9 protons and 10 neutrons. Since an atom is electrically neutral, the number of electrons is equal to the number of protons, so fluorine also has 9 electrons.

Nitrogen has 7 protons and 15 nucleons. Since the number of protons is equal to the atomic number, nitrogen also has 7 electrons. The number of neutrons can be calculated by subtracting the number of protons from the number of nucleons, so nitrogen has 15 - 7 = 8 neutrons.