Counting Atoms Practice

Front

What is a chemical compound?

Back

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

Front

How do you determine the number of elements in a compound?

Back

Count the different types of elements present in the chemical formula.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the compound.

Front

In the formula NaHCO3, how many different elements are present?

Back

4 (Sodium, Hydrogen, Carbon, and Oxygen).

Front

How many atoms of chlorine are in 4 NaCl?

Back

4 atoms of chlorine.

Front

What is the total number of atoms in 2 H2O?

Back

6 atoms (4 Hydrogen and 2 Oxygen).

Front

What does the coefficient in a chemical formula represent?

Back

The coefficient indicates the number of molecules or formula units of the compound.

Front

In the formula C8H10N4O2, how many hydrogen atoms are there?

Back

10 hydrogen atoms.

Front

How many elements are in the compound N2O?

Back

2 elements (Nitrogen and Oxygen).

Front

What is the significance of the chemical formula?

Back

It provides information about the types and numbers of atoms in a compound.