which of the following is an example of a chemical change

an element that has properties of both metals and nonmetals is

a property of matter that can be observed without changing the identity of the matter is

which of the following is not a state of matter

which elements do not chemically combine with other elements

when two elements combine in a chemical reaction the mass of the new substance:

the law of conservation of mass states that

Sodium is classified as a

Sodium has how many protons

What is the ratio of oxygen molecules in water as opposed to hydrogen peroxide

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