Chemistry Project Question 1

Diagram of an atom

There are numerous atoms around the world, around us and even our bodies are made up of atoms. Each atom consists of main sub-atomic elements called "Electrons","Protons" and "Nutrons".

Protons and Neutrons are inside the nucleus shell whereas the Electrons are revolving around the nucleus in its own electron shell. Protons are positively charged (+) whereby the Electrons are negatively charged (-) . Nonetheless, Neutrons have zero charge and they are neutral as the name given. The outer-most electron shell of an atom is called as "valenced shell" and the valency of the atom depends on the number of electrons in the outer-most shell.

In every atom, the first shell can contain 2 electrons follwed by 8 electrons each till 3rd shell. However, starting from 4th shell, each electron shell can contains 18 electons.

Every atom has same number of Proton(+) and Electrons(+) for them to be electrically neutral. Both Proton and Neutrons have relative mass of 1. On the other hand, Electron has relatvie mass of 1/1840, which is negligible.