Chemistry 1.6: Atomic Theory and The Periodic Table

Atomic Theory and The Periodic Table

by Amie Ojerio

Multiple Select

Which of Dalton’s ideas are still considered correct today?

• All matter is made of atoms

• Atoms are small and cannot be destroyed or divided

• All atoms of the same element have identical mass and other properties

• Chemical compounds are formed by a combination of two or more different kinds of atoms

• A chemical reaction is a rearrangement of atoms

Multiple Choice

What did Thomson’s experiment show about atoms?

• Atoms were indivisible

• Atoms contained negatively charged particles

• Atoms of the same element were identical

Multiple Choice

What was Millikan trying to determine in his Oil-Drop Experiment?

• The mass of the oil drops

• The charge of an electron

• The speed of electrons

Multiple Choice

What does Rutherford’s Gold Foil experiment tell us about atoms?

• Atoms have a negative charge

• Atoms have no electrons

• Atoms are mostly made up of empty space

Multiple Choice

Where are the electrons located in the Bohr model of the atom?

• In the nucleus

• In orbit around the nucleus

• With the neutrons

Multiple Choice

What does the photoelectric effect experiment show?

• Light can remove electrons from atoms

• Light can transform into electrons

• Light is made of electrons

Multiple Choice

Will the atomic model change in the future?

• It will change if new evidence is found

• No, the model is perfect as it is

• No, scientists try not to change their old models

Multiple Choice

How is the Periodic Table Organized?

• The order in which the element was discovered

• How common the element is

• The number of neutrons in the element

• The number of protons in the element

Multiple Choice

What is the mass number of oxygen with 8 protons and 9 neutrons?

• 17

• 8

• 9

Multiple Choice

How many neutrons does an atom of Beryllium (atomic number 4) have if the mass number is 9?

• 4

• 9

• 13

• 5

Multiple Choice

How many electrons does a neutral Nitrogen atom have (atomic number 7)?

• 14

• 7

• 0