Counting Elements and Atoms

Front

How many elements are in the chemical formula Zn(NO₃)₂?

Back

3

Front

What is a coefficient in a chemical formula?

Back

The large number to the left of a formula.

Front

How many atoms are in the chemical formula (NH₄)₂SO₄?

Back

15

Front

Is O₂ an element or a compound?

Back

Element

Front

Which of the following is a compound: Co, O₂, C, CO₂?

Back

CO₂

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

How do you determine the number of atoms in a compound?

Back

Add the subscripts of each element in the formula.

Front

What does the subscript in a chemical formula indicate?

Back

The number of atoms of the element in the molecule.

Front

What is the difference between a molecule and a compound?

Back

A molecule can be made of the same or different elements, while a compound is made of different elements.