Counting Atoms Practice

Front

How many Oxygen atoms are in Al₂(SO₄)₃?

Back

12

Front

How many atoms of Oxygen are in Fe(NO₃)₃?

Back

9

Front

How many atoms of Hydrogen are in H₂O?

Back

2

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

What does it mean if there is no subscript following the element symbol?

Back

It means there is only 1 atom of that element.

Front

What is the formula for calculating the total number of atoms in a compound?

Back

Add the number of atoms of each element, considering their subscripts.

Front

In the compound CaCl₂, how many Chlorine atoms are present?

Back

2

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of an element symbol indicating the number of atoms of that element.

Front

How many total atoms are in the compound C₆H₁₂O₆?

Back

24 (6 Carbon + 12 Hydrogen + 6 Oxygen)

Front

What is the significance of parentheses in chemical formulas?

Back

They indicate that the enclosed atoms are a group that can be multiplied by a coefficient.