An element is a _________ substance.

Molecules are the smallest part of a ______________.

Compounds are made of two or more elements _____________ bound together.

A chemical formula is _____________________.

The chemical formula for water is H2O. How many atoms are in a molecule of water?

Elements are represented by letters, either a capital or capital and lower case, called ________ __________.

Which of the following is a compound?

Which of the following is an element?

Baking soda, NaHCO3, has how many carbon atoms?

Baking soda, NaHCO3, has how many hydrogen atoms?

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