The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

♪ I'd be an ATOM
without a bomb ♪
The Big Bang Theory Season 7, Episode 6

Structure, constant structure.
One ATOM.
The Big Bang Theory Season 3, Episode 14

Atom of hydrogen,
Adam of Maroon 5, mic drop.
The Big Bang Theory Season 9, Episode 23

A hydrogen ATOM, H,
plus pigs minus P, "higs."
The Big Bang Theory Season 3, Episode 13

links together every ATOM
in the universe.
Hmm.
The Big Bang Theory Season 12, Episode 21