Counting Atoms

Front

What is the chemical formula for aluminum oxide?

Back

Al₂O₃

Front

How many aluminum atoms are in Al₂O₃?

Back

2

Front

How many carbon atoms are in H₂C₃O₄N₅?

Back

3

Front

If there is no subscript in a chemical formula, how many atoms of that element are present?

Back

1

Front

What does a subscript in a chemical formula indicate?

Back

The number of atoms of the element before it.

Front

How many different elements are in H₂C₂H₃O₂?

Back

3

Front

What is the significance of subscripts in chemical formulas?

Back

They indicate the number of atoms of each element in a compound.

Front

What is the total number of atoms in the compound H₂O?

Back

3 (2 hydrogen + 1 oxygen)

Front

In the compound C₆H₁₂O₆, how many hydrogen atoms are there?

Back

12

Front

What is the term for a substance made of two or more different elements?

Back

Compound