Answer: " 4, 1, 2, 3."
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" In molecules, C, H, O, and N atoms usually make _4_, _1_, _2_, and
_3_ bonds, respectively."
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Note the following mnemonic device:
" H O N C " —> "Honc" if you love molecules!"
1 2 3 4 ;
{"hydrogen"} H → 1
{"oxygen"} O → 2
{"nitrogen"} N → 3
{"carbon"} C → 4
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So: by using this mnemonic:
H O N C ;
1 2 3 4 ;
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→ We can answer the question:
" C, H, O, N " → in sequence:
" 4, 1, 2, 3 " ;
{just use the corresponding numbers as per the mnemonic device.}.
The answer: " 4, 1, 2, 3 ".
Hope this is helpful to you! Best wishes!
