Question

11. Element or compound? O2 *

1) Element
2) compound

Answer 1

Answer:

An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is. ... Currently, scientists know of 118 different elements

Compound is a pure substance which is composed of two or more elements , combined chemically in a fixed proportioj by weight and can be broken into elements by chemical methods alone..

Explanation:

Answer 2

Answer:

Element

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