<span>From the above given choices :
melting is an endothermic process</span>
True, both of the red and white phosphorus is a pure substance.
Both red and white phosphorus is made of phosphor element but they have a different structure which causes them to have a different color. This phenomenon called allotropes when a chemical element has two or more different form.They are not compounds as they are only made of phosphorus. A compound should be made by at least two different elements.
Answer:
characteristics i believe
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Answer:7 atom of carbon+5atom of hydrogen +3atom of nitrogen +6 atom of oxygen =21