Question

Write the atomic number and find the number of protons, electrons and neutrons
and also the electronic configuration of the following elements.
1) Fluorine
2) Sodium
3) Calcium
4) Bromine
5) Germanium
6) Krypton
7) Selenium
8) Potassium
9) Indium
10) Arsenic.

Answer 1

Answer:

Flourine - Atomic number = 9, Electronic configuration - 2,7

Sodium - Atomic number = 11, Electronic configuration - 2,8,1

Calcium - Atomic number = 20, Electronic configuration - 2,8,8,2

Bromine - Atomic Number = 35, Electronic configuration - 2,8,8,17

Germanium - Atomic number = 32, Electronic configuration - 2,8,8,14

Krypton - Atomic number = 36, Electronic configuration - 2,8,8,18

Selenium - Atomic number = 34, Electronic configuration - 2,8,8,16

Potassium - Atomic number = 19, Electronic configuration - 2,8,8,1

Indium - Atomic number = 49, Electronic configuration - 2,8,8,31

Arsenic - Atomic number = 33, Electronic configuration - 2,8,8,15

Explanation:

This happens because the first energy shell can hold up to 2 electrons at max. The second energy shell can hold up to 8 electrons. The third energy shell can hold up to 8 electrons. And the fourth energy shell can hold up to 32 electrons