H2O is a substance that that is classified as a compound. It is the chemical formula of water. A compound is two or more elements that have been chemically combined. In this question, water has two elements which are hydrogen (H) and oxygen (O). Two hydrogen atoms combine with one oxygen atom to form a compound. The answer will thus be B.
I think its rough and jagged. Do you know the answer?
Answer:
Egg.
Explanation:
Technically speaking, dinosaurs were some of the first living creatures on Earth, and they laid eggs long before chickens were around.
