Counting Atoms

Front

How many Magnesium atoms are in 10MgCl₂?

Back

10

Front

Calculate the number of Oxygen atoms in Al(OH)₃.

Back

3

Front

What does the subscript in a chemical formula tell you?

Back

It tells you how many atoms are present.

Front

How many Sodium atoms are in 6NaCl?

Back

6

Front

NaCl is the chemical formula for salt. Is NaCl considered a compound or an element?

Back

compound

Front

What is a chemical formula?

Back

A representation of a substance using symbols for its constituent elements.

Front

What does the coefficient in a chemical formula indicate?

Back

It indicates the number of molecules present.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded.

Front

How many total atoms are in the formula C₆H₁₂O₆?

Back

24 (6 Carbon + 12 Hydrogen + 6 Oxygen) = 24 total atoms.

Front

What is the significance of parentheses in a chemical formula?

Back

Parentheses indicate that the atoms inside are grouped together and the subscript applies to all atoms within the parentheses.