CH4
If you're talking about formula like chemical formula (NaCl), there isn't one exactly, though sometimes a line is used (single line for a single bond, double line for a double bond, triple line for a triple bond). If you mean like a mathematical formula (LCAO or something similar), then Levine's Quantum Chemistry has a much more thorough treatment than we could possibly give here.
this means that there is a single covalent bond
Single line.
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he joke where the punch line is Boo mop is the 'The Best Lame Joke'.
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The joke where the punch line is boo-vine is what do you call a cow that's a ghost?
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The joke where the punch line is mop is Knock knock. Who's there? I eat mop. I eat mop who? That's disgusting.
The Punch Line was created in 1981.
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The answer to the joke 'the punch line is hippopotamop' is 'crazy'.
The joke where the punch line is Lion is the Cheese Joke.
The joke where the punch line is Hoppy bees is about the Bee and the butterfly.