Counting Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is the atomic symbol for Calcium?

Back

The atomic symbol for Calcium is Ca.

Front

How do you count atoms in a chemical formula?

Back

Count the number of each type of atom represented by the symbols in the formula, considering subscripts.

Front

What does a subscript in a chemical formula indicate?

Back

A subscript indicates the number of atoms of the element that precedes it.

Front

How many atoms of Hydrogen are in H₂O?

Back

There are 2 atoms of Hydrogen in H₂O.

Front

What is the total number of atoms in C₆H₁₂O₆?

Back

There are 24 total atoms in C₆H₁₂O₆ (6 Carbon, 12 Hydrogen, 6 Oxygen).

Front

How many atoms of Iron are in Fe₂O₃?

Back

There are 2 atoms of Iron in Fe₂O₃.

Front

What is the atomic symbol for Carbon?

Back

The atomic symbol for Carbon is C.

Front

How many total atoms are in 2H₂SO₄?

Back

There are 14 total atoms in 2H₂SO₄ (4 Hydrogen, 2 Sulfur, 8 Oxygen).

Front

What does the coefficient in a chemical formula represent?

Back

A coefficient indicates the number of molecules or formula units of the substance.