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#1

#2

Yes here we can see the dots and crosses clearly.

#3

It's Methane or CH_4

#4

There is no double bond

#1

See H and C have shared their electrons so its Covalent bonding

#2

Yes, here we can see the dots and crosses clearly.

Dot and crosses diagram

#3

It's Methane or CH_4

4 single bonds

#4

There is no double bond

Explanation:

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1.43 x 10^-11 j the guy commented the awnser just making sure u see it .