Atoms and Molecules Review

Periodic Table: Atoms and Molecules Test

Look at the picture to the left

You will answer the next 4 questions using this picture

Vocabulary Review

Atoms- smallest unit of matter (broken into protons, neutrons and elections)

Molecules- Group of Atoms bounded together

Elements-substance that cannot be broken down-- The Periodic Table is a list of them.

Multiple Choice

How many atoms are in the picture of methane?

• 5 (Five)

• 1 (One)

• 2 (Two)

Multiple Choice

How many molecules are in the picture of methane?

• 5 (Five)

• 1 (One)

• 2 (Two)

Multiple Choice

How many different elements are in the picture

• 5 (Five)

• 1 (One)

• 2 (Two)

Look at the Magnesium information from the periodic table to answer the next 4 questions.

Multiple Choice

How many neutrons does this atom of magnesium have?

• 11 (Eleven)

• 12 (Twelve)

• 13 (Thirteen)

Multiple Choice

How many protons does this atom of magnesium have?

• 11 (Eleven)

• 12 (Twelve)

• 13 (Thirteen)

Multiple Choice

If this atom gained an electron to be a negative -1 ion, how many electrons would it have?

• 11 (Eleven)

• 12 (Twelve)

• 13 (Thirteen)

Multiple Choice

If this atom lost an electron to be a negative +1 ion, how many electrons would it have?

• 11 (Eleven)

• 12 (Twelve)

• 13 (Thirteen)

Periodic Table

For the next four (4) questions, you will need to look at your Periodic Table.

Multiple Choice

An atom has 8 protons, 8 neutrons, and 8 electrons.

What element is being described?

• Oxygen

• Iron

• Nitrogen

• Fluorine

Multiple Choice

An atom has 8 protons, 8 neutrons, and 8 electrons.

What is the atomic mass?

• 8

• 15.9999 or rounded to 16

• 2

• 6

Multiple Choice

An atom has 8 protons, 8 neutrons, and 8 electrons.

What is the overall charge of the atom?

• natural

• negative -1 Ion

• posative +1 ion

Vocabulary Review Page 2

Atomic Mass- the mass of an atom. About the same as the number of protons and neutrons combined.

Valence Electrons- the number of electrons in the outer shell.

Atom Models

Multiple Choice

What scientist developed this model of the atom.

• Dalton

• Thomson

• Rutherford

• Bour

Multiple Choice

In this model, protons are yellow, neutrons are blue and electrons are red.

What element is this?

• Carbon

• Magnesium

Multiple Choice

In this model, protons are yellow, neutrons are blue and electrons are red.

What is the Atomic Mass

• 6

• 11

• 16

Multiple Choice

How many valence electrons does this model of Sodium have?

• 2

• 11

• 1