What is the primary difference between an element and a compound?

What forms when carbon (C) and oxygen (O) chemically combine?

Which of the following is an example of an element?

Why is carbon dioxide (CO2) classified as a compound?

How many different elements are in the chemical formula in CH4?

Which of the following chemical symbols best represents an element?

Which of the following is a chemical formula?

Which of the following is most abundant in the Earth’s crust?

When writing a symbol for an element, which rule is important to remember?

How many different elements are involved in the chemical equation - C2H5OH + O --> 2 CO+H2O

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