Counting Atoms Semester Exam Review Fall 2024

Front

How many atoms of Hydrogen are in H₂O?

Back

2

Front

How many elements are in the chemical formula HCl?

Back

2

Front

What is a subscript in a chemical formula?

Back

A small number below an element symbol that tells the number of atoms of that element.

Front

In the formula C₃H₅(NO₃)₃, how many atoms of Carbon (C) are there?

Back

3

Front

In the formula C₃H₅(NO₃)₃, how many atoms of Hydrogen (H) are there?

Back

5

Front

In the formula C₃H₅(NO₃)₃, how many atoms of Nitrogen (N) are there?

Back

3

Front

In the formula C₃H₅(NO₃)₃, how many atoms of Oxygen (O) are there?

Back

9

Front

How many Aluminum atoms are in Al₂O₃?

Back

2

Front

What does the term 'chemical formula' mean?

Back

A representation of a substance using symbols for its constituent elements and numbers to indicate the ratio of atoms.

Front

What is the significance of subscripts in chemical formulas?

Back

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