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

Multiple Choice

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

• valence electrons

• electron shells

• electrons

• protons

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

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