Counting Atoms

Front

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

Back

To find the total number of atoms in a compound, add the subscripts of each element in the formula.

Front

How many Nitrogen atoms are in (NH₄)₂CrO₄?

Back

2

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

Which of the following is a compound: Co, O₂, C, CO₂?

Back

CO₂ is a compound.

Front

What does C₂H₈O represent?

Back

C₂H₈O is a compound.

Front

How many Aluminum atoms are in Al₂O₃?

Back

2

Front

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

Back

9

Front

What is a subscript in a chemical formula?

Back

A subscript is a number written below and to the right of a chemical symbol that indicates the number of atoms of that element in a molecule.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded.

Front

How many total atoms are in the compound C₆H₁₂O₆?

Back

24 (6 Carbon + 12 Hydrogen + 6 Oxygen = 24 total atoms).