Atomic Structure, Waves and Isotopes

The word “atom” comes from the Greek “atomos."  What does "atomos" translate to?

• Important
• Atmosphere
• Indivisible
• Cuttable

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.

• The "Plum Pudding Model" of the atom
• The "Rutherford Model" of the atom
• Democritus's model of the atom
• The "Solar System Model" of the atom

Which model was developed using the gold foil experiment?

• Thomson Model
• Rutherford Model
• Cloud Model
• Bohr Model

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

What is the atomic number?

• 35

• 18

• 17

• 52

Where are the Electrons found in the structure of an atom?

• In the nucleus
• In spaces around the nucleus

How many neutrons does a sodium atom have? (Use the image to help you)

• 23
• 11
• 12
• 34

What two particles make up the ATOMIC MASS of an element? 

• Protons and Neutrons
• Protons and Electrons
• Electrons and Nucleus
• Electrons and Neutrons

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

• Atom is mostly empty space

• The nucleus is positively charged

• The atom has a small dense nucleus

• All answers are correct