Counting Atoms

Front

What are subscripts in a chemical formula?

Back

Subscripts are the small numbers written to the lower right of an element symbol in a chemical formula that indicate the number of atoms of that element in a molecule.

Front

What information does a subscript provide in a chemical formula?

Back

A subscript indicates how many atoms of the element are present in the molecule.

Front

How many atoms of Hydrogen are in the molecule H2O?

Back

There are 2 atoms of Hydrogen in H2O.

Front

What is the total number of atoms in the molecule H2SO4?

Back

There are 7 total atoms in H2SO4 (2 Hydrogen, 1 Sulfur, and 4 Oxygen).

Front

How many valence electrons does Argon have?

Back

Argon has 8 valence electrons.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms, influencing the formation of molecules.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O.

Front

How do you determine the total number of atoms in a chemical formula?

Back

Add the number of atoms represented by each element's subscript in the formula.

Front

What does the chemical formula H2SO4 represent?

Back

H2SO4 represents sulfuric acid, which contains 2 Hydrogen, 1 Sulfur, and 4 Oxygen atoms.

Front

What is the role of subscripts in balancing chemical equations?

Back

Subscripts indicate the number of atoms of each element, which is essential for ensuring that the same number of each type of atom is present on both sides of the equation.