Chemical Formulas and Counting Atoms Flashcard

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the number and type of atoms in a molecule using symbols and numbers.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the molecule. For example, in H2O, the '2' indicates there are 2 hydrogen atoms.

Front

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

Back

Add up all the atoms represented in the formula, including those indicated by subscripts.

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 bonded together.

Front

How many elements are in the formula H2SO4?

Back

There are 3 elements: Hydrogen (H), Sulfur (S), and Oxygen (O).

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, which can be of the same or different elements.

Front

What is the total number of atoms in the formula H2O2?

Back

There are 4 atoms in total: 2 Hydrogen and 2 Oxygen.

Front

How many carbon atoms are in the formula C6H12O6?

Back

There are 6 carbon atoms in the formula.

Front

What is the total number of atoms in the formula C8H3NaBr12?

Back

There are 24 atoms in total: 8 Carbon, 3 Hydrogen, 1 Sodium, 12 Bromine.

Front

What is the significance of parentheses in chemical formulas?

Back

Parentheses indicate that the atoms inside are grouped together and can be multiplied by a subscript outside the parentheses.