Atomic History and Structure Review

Which distinguishes an atom of one element from an atom of a different element?

• the number of protons

• number of neutrons

• number of electrons

• the number of neutrons and protons

What is the currently accepted model of the atom?

• Plum Pudding Model

• Planetary Model

• Bohr Model

• Electron Cloud Model

Who proposes that elements are tiny, solid particles that could not be divided

• Democritus

• Dalton

• Chadwick

• Rutherford

 An element with an atomic number of 51 and an atomic mass of 121 has how many neutrons in each atom?

• 51

• 70

• 121

• 172

Tags

NGSS.MS-PS1-1

What is the atomic number of carbon-14

• 6

• 7

• 12

• 14

Which describes an atom with an atomic number of 9?

• 10 protons and 9 neutrons

• 9 protons and 10 neutrons

• 4 protons and 5 neutrons

• 3 protons and 3 neutrons

Tags

NGSS.MS-PS1-1

How do the atoms of carbon-12 and carbon-14 differ?

• Atomic number

• Number of electrons

• Number of protons

• Number of neutrons

How many protons are in an atom of bromine?

• 3

• 12

• 35

• 40

What subatomic particle has no charge?

• protons

• neutrons

• electrons

• nucleons

To find the atomic mass you

• subtract the atomic number from the mass number

• subtract the mass number from the atomic number

• add the atomic number and the number of neutrons

• add the atomic number and number of electrons