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Just like every thing is made up of tiny cells, those tiny cells are made up of something even smaller called an ATOM!

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Just like every thing is made up of tiny cells, those tiny cells are made up of something even smaller called an ATOM!

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Atoms are the building blocks of everything around us! They are so tiny that a single cell may contain a hundred trillion of them.

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Atoms are the building blocks of everything around us! They are so tiny that a single cell may contain a hundred trillion of them.

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An atom contains a central nucleus with electrons orbiting around it.

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An atom contains a central nucleus with electrons orbiting around it.

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The nucleus itself is made up of two different particles:

1) Protons

2) Neutrons

Both of these are packed together in a tight ball.

This means an atom is made up of protons (p), neutrons (n), and electrons (e).

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Protons, neutrons, and electrons live in an atom, hence they are known as subatomic particles! They all look different and have properties like charge and mass.

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Protons, neutrons, and electrons live in an atom, hence they are known as subatomic particles! They all look different and have properties like charge and mass.

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Let's talk about their charges first.

Protons are Positive. Note the P in both and that might help you remember.

Neutrons are Neutral.

We are left with Electrons and they are negative.

Know that the charge of protons and electrons is equal in an atom. Neutrons don't have any charge.

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Protons and neutrons are heavier. They both have a mass of 1.

Electrons are very very small in their mass. An electron is 2000 times lighter than a proton. That's like comparing an ant to a mountain!

These electrons are revolving around the nucleus of an atom all the time. Sometimes for ease, one can also say that their mass is as small as zero.