Unit 3 Test

Organize the findings and models that each scientist contributed to the Atomic Theory.

Groups:

(a) John Dalton

,

(b) J.J. Thomson

,

(c) Ernest Rutherford

,

(d) Niels Bohr

• 
• Organized electrons into shells based on energy

• Discovered the electron with a cathode ray

• 
• Used Greek philosopher's ideas to create the first Atomic Theory

• Determined that the atom is mostly empty space with the gold foil experiment

• 
• Discovered the existence of the nucleus

• 

The Greek Philosopher named ​ (a)   came up with the term ​ (b)   to describe his ideas about atoms.

• Democritus
• Aristotle
• atomos
• little bits

Which of the following is NOT part of Dalton's Atomic Theory?

• Atoms are indivisible

• Atoms of a given element are always different from one another

• Different atoms can combine to create compounds

• Chemical reactions occur when atoms are separated, joined together or rearranged

Which atomic model is the most accurate, but hard to use?

• Bohr Model

• Plum Pudding Model

• Planetary Model

• Cloud of Probability

Match each part of an atom to its charge.

• Positive

• Electron

• Negative

• Neutron

• No Charge

• Proton

Match each part of an atom to its function.

• Stabilizes the atom

• Proton

• Identifies the atom

• Neutron

• Important in bonding and reactivity

• Electron

Where can you find an electron?

Tags

NGSS.HS-PS1-1

Where can you find a neutron?

Tags

NGSS.HS-PS1-8

Where can you find a proton?

Tags

NGSS.HS-PS1-8

Based on the model in the picture, what is the identity of the element?

• Oxygen

• Nitrogen

• Beryllium

• Lithium

Tags

NGSS.HS-PS1-1