what do we call these substance in short--------- oxygen, kerosene, carbon, potassium, soda, nitrogen, coal, petrol, hydrogen, water, etc.

Dear Student,

Your question is not clear and appears to be incomplete. If you are asking about the symbols of the given elements then here is your answer-

Oxygen = O
Kerosene = Paraffin
Carbon = C
Potassium = K
Soda = NaO, NaOH, Na2CO3, NaHCO3
Nitrogen =N
Coal = C
Petrol = Gasoline
Hydrogen = H
Water = H2O

Recheck your question or please be a little specific about the name of the chapter/textbook to which you are referring here so that we can provide you with some meaningful help.

Look forward to hearing from you again!

Regards

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