Counting Atoms

Front

What is the chemical formula for a compound with 3 Carbon, 5 Hydrogen, 3 Nitrogen, and 9 Oxygen atoms?

Back

C₃H₅(NO₃)₃

Front

What is the big number at the beginning of a chemical formula called?

Back

Coefficient

Front

What are the blue atoms in the periodic table called?

Back

Metals

Front

How many Magnesium atoms are in the formula 10MgCl₂?

Back

10

Front

What do coefficients in chemical formulas do?

Back

Multiply EVERYTHING!

Front

What is a subscript in a chemical formula?

Back

A number written below and to the right of an element symbol indicating the number of atoms of that element in a molecule.

Front

What is the difference between a coefficient and a subscript?

Back

A coefficient multiplies the entire molecule, while a subscript only applies to the element it follows.

Front

How many total atoms are in the molecule C₃H₅(NO₃)₃?

Back

17 atoms (3 C + 5 H + 3 N + 9 O = 20 total atoms).

Front

What does the formula MgCl₂ indicate about the number of Chlorine atoms?

Back

There are 2 Chlorine atoms for every 1 Magnesium atom.

Front

What is the purpose of using chemical formulas?

Back

To represent the composition of a substance using symbols and numbers.