Atoms & The Periodic Table

Multiple Choice

Whch scientist said, "The universe was made of indivisible units called atoms"?

• Democritius

• Dalton

• Rutherford

• Aristotle

Multiple Choice

_________________________ stated that all atoms of a given element were exactly alike, but these atoms could join together to form compounds. This theory is considered the foundation of today’s atomic theory.

• Democritus

• Dalton

• Aristotle

• Rutherford

Multiple Choice

_____________________ suggested electrons orbit around the atom much like the planets in our solar system orbit around the sun. In this model, each electron has a certain energy that is determined by its path around the nucleus.

• Dalton

• Bohr

• Rutherford

• Mendeleev

Multiple Choice

____________________ was a Russian chemist and inventor. He is best remembered for formulating the Periodic Law and creating a version of the periodic table of elements.

• Meendeleev

• Dalton

• Mosley

• Artisotle

Multiple Choice

_______________ organized the periodic table by atomic number rather than atomic mass.

• Mendeleev

• Dalton

• Mosley

• Aristotle

Multiple Choice

The atomic number is equal to the number of ______________.

• Protons

• Electrons + Protons

• Neutrons

• Protons + Neutrons

Multiple Choice

The atomic mass is equal to ___________.

• Protons

• Protons + Neutrons

• Electrons

• Neutrons

Fill in the Blank

____________________ of an element have a different number of neutrons than the original element.

Fill in the Blank

Horizontal Rows in the periodic table are called ______________.

Fill in the Blank

Atoms in the same ___________ have the same number of valence electrons, so these elements have similar properties.

Multiple Choice

Elements in the same period have the same number of _______.

• valence electrons

• electron shells

• electrons

• protons

Fill in the Blank

The Law of _____________ ____________________ states a chemical compound always contains the same elements in exactly the same proportions by weight or mass.

Fill in the Blank

_____________ is a Greek word meaning “unable to be divided.”

Multiple Choice

Protons have a ____________ charge.

• positive

• negative

• neutral

• none of the above

Multiple Choice

Neutrons have a ______________ charge.

• positive

• negative

• neutral

• none of the above

Multiple Choice

Electrons have a ___________ charge.

• positive

• negative

• neutral

• none of the above

Fill in the Blank

Which element has 2 electron shells and 5 valence electrons?

Fill in the Blank

Which element has 3 electron shells and a full outer electron shell?

Fill in the Blank

Which element has 4 electron shells and 2 valence electrons?

Multiple Choice

Which element is represented by this electron dot diagram?

• Chlorine

• Krypton

• Calcium

• Cobalt

Multiple Choice

Which element is represented by this electron dot diagram?

• Oxygen

• Xenon

• Osmium

• Sodium

Fill in the Blank

How many electrons can the first energy level hold?

Fill in the Blank

How many electrons is considered a full energy level after the first energy level?

Fill in the Blank

How many valence electrons does Boron have?

Fill in the Blank

How many valence electrons does Xenon have?

Fill in the Blank

How many valence electrons does Potassium have?

Fill in the Blank

How many electron shells does Bromine have?

Fill in the Blank

How many electron shells does Francium have?

Fill in the Blank

What is the atomic number for Oxygen?

Fill in the Blank

What is the atomic number for Krypton?