# Chemistry - Atoms

There are three basic parts of an atom. They are the proton, neutron and the electron

The proton has a positive$(+)$ charge, the neutron has a neutral$(0)$ charge, and the electron has a negative$(-)$ charge

Amount

Protons

• The number of protons is simply the atomic number of the chemical in the periodic table

Electrons

• The number of electrons in an atom is the number of protons so that it can have a neutral charge

• But an atom may also lose or get electrons and that may cause it to be an ion

Neutrons

• You can get the number of neutrons in each atom here

• Or, you get the mass number of a chemical, that is the atomic weight rounded to the nearest ones, then subtract it by the number of protons

In example,

the atomic weight of carbon is $12.0107$, so the mass number is $12$

mass number = number of protons + number of neutrons

number of neutrons = mass number - number of protons

number of neutrons = $12-6$

number of neutrons = $6$ in a carbon atom

Properties

Protons

• It is in the centre of the nucleus of an atom

Neutrons

• It is also in the centre of the nucleus with the proton

Electrons

• The electron is special as it moves all around the nucleus because of the attraction of the protons. (It has a negative charge and proton has a positive charge, and they both will attract to each other like a magnet)

• Its mass is about $1000$ smaller than the proton

Note by Daniel Lim
7 years, 4 months ago

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- 5 years, 7 months ago

i just han ana exam about it :D

- 7 years, 4 months ago