Counting Atoms and Elements

Front

What are element symbols?

Back

Element symbols are representations of elements, consisting of a single uppercase letter or an uppercase letter followed by a lowercase letter. They indicate the types of elements in a compound.

Front

How many Oxygen atoms are in H₂O?

Back

1

Front

In the formula 5CO₂, how many molecules are there?

Back

5 molecules

Front

In the formula 5CO₂, how many elements are present?

Back

2 elements

Front

How many Oxygen atoms are in Al₂(SO₄)₃?

Back

12

Front

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

Back

24

Front

What does the subscript in a chemical formula indicate?

Back

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

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the difference between an atom and an element?

Back

An atom is the smallest unit of matter, while an element is a pure substance made up of only one type of atom.

Front

What is a compound?

Back

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