Atomic History and Structure

Rutherford and his students did experiments that showed

• quark

• nucleus

• proton

• electron

Which one of these is Dalton's Model?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Which model was created after the discovery of the nucleus?

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Who discovered electrons?

• Rutherford

• Bohr

• J.J. Thompson

• Democritus

Ions are: 

• atoms with a positive or negative charge

• atoms with no charge

• atoms with ONLY a positive charge

• atoms with ONLY a negative charge

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

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