Unit 2 - Atomic Theory

Who determined the quantity of the charge of an electron?

• Dalton

• millikan

• Democritus

• thomson

This subatomic particle has a positive charge

• proton
• neutron
• electron

This subatomic particle has a negative charge

• proton
• neutron
• electron

This subatomic particle has no charge

• proton
• neutron
• electron

This subatomic particle is found in the nucleus

• proton
• neutron
• electron
• two of these

Tags

NGSS.HS-PS1-8

This sub atomic particle is so small we assume it has zero mass

• proton

• neutron

• electron

The nucleus is best described as

• having a low density and high mass
• having a high density and low mass
• having a low density and low mass
• having a high density and high mass

The mass number of an atom is equal to

• protons
• protons + neutrons
• neutrons + electrons
• electrons

The atomic number is equal to the number of ______ in an atom

• protons
• protons + neutrons
• electrons + neutrons
• electrons

The nucleus of an atom has a ____ charge

• positive
• negative
• neutral

Tags

NGSS.HS-PS1-8