Who carried out the gold foil experiment and found that most of the atom is empty space with a dense, central nucleus? NOTE: Spelling matters NOTE: Last name only

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NGSS.HS-PS1-8

________________ have a negative charge and are found in energy levels around the nucleus.

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NGSS.HS-PS1-1

Who developed the "billiard ball theory"?

NOTE: Spelling matters

NOTE: Last name only

Who developed the electron cloud/quantum model theory that includes the uncertainty principle?

• Dalton

• Heisenberg/Einstein/Schrodinger

• Rutherford

• Bohr

Who discovered the electron and developed the "plum pudding theory"?

NOTE: Spelling matters

NOTE: Last name only

___________ have a positive charge and are located in the nucleus of an atom.

NOTE: Spelling matters

_____________ have no charge and are found in the nucleus of an atom.

NOTE: Spelling matters

The mass of which two particles contribute to the mass number?

• Proton

• Neutron

• Electron

• Electron Cloud

A _______________ ________________ is located in the outermost energy level of an atom and is responsible for the creation of chemical bonds.

Two words - Spelling counts!

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the structure of an atom?

• An atom has a nucleus containing protons and neutrons, with electrons in an electron cloud surrounding the nucleus

• An atom has only protons and electrons

• An atom has only neutrons and electrons

• An atom has a nucleus containing only protons, with electrons in an electron cloud surrounding the nucleus

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NGSS.MS-PS1-1