March 29, 2020, 08:09:22 PM
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Topic: If you know the number of electrons there are on an atom can you find its formul  (Read 3357 times)

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Offline appleseed

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If you know the outer number of electrons there are on an atom can you find its formula?

If you have and atom X with 4 outer electrons
and Y with 5 outer electrons do you just swap the numbers round to find the formula of its compound?
so i end up with X5Y4?
Or is this the way to find an ionic formula?

ThankYOu!

Offline sm2345

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It generally works for ionic compounds.

Offline appleseed

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hmm, the question says that its covalent
so what should i do?

Offline sm2345

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Could you please clarify what the question is?

Offline appleseed

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ok the question is deduce the formula of a covalently bonded compound that contains X (with 4 outer electrons ) and Y with 6 outer electrons.
I was just wondering if there's a general formula or rule that can help me deduce the formula with any number of electrons

Offline abhaymv

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Swapping should work, and you should cancel out the common factors.
So,it is
X3Y2
This,Ithink, is the answer..

Offline pingvincina

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in my opinion it's easier to take examples...if it's a covalent bond, take for example carbon and oxygen,they will form CO2,so it's XY2...but if the bond is ionic than it's X6Y4=X3Y2

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