Noble gases: The high and mighty helium

Helium was discovered on the sun before it was found on earth. What about it as a noble gas makes it so good at hiding?

What is atomic structure?

The atom is not a featureless ball. It consists subatomic particles arranged in a mind-boggling way.

Ions & ionic bonding

The story of give and take, in terms of electrons

Covalent bond in molecules

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