Counting Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus made of protons and neutrons, surrounded by electrons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together. It can consist of the same or different elements.

Front

What is a compound?

Back

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

Front

What is the chemical formula for water?

Back

Front

What does the subscript in a chemical formula indicate?

Back

The subscript in a chemical formula indicates the number of atoms of the element present in the molecule.

Front

Which element is least likely to form a compound?

Back

Argon is least likely to form a compound because it is a noble gas with a full valence shell.

Front

What is the chemical formula for sodium fluoride?

Back

Front

How many atoms of oxygen are in magnesium sulfate (MgSO4)?

Back

There are 4 atoms of oxygen in magnesium sulfate (MgSO4).

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 together.

Front

What is the chemical formula for carbon dioxide?

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