History of the Atom Quiz

What are atoms made up of?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Protons and neutrons surrounded by electrons

Tags

NGSS.MS-PS1-1

Which of the following is an example of a compound?

• Air

• Salad

• Oxygen

• Saltwater

Tags

NGSS.MS-PS1-1

Who was the first person to propose that matter was made of indivisible atoms?

• Rutherford

• Democritus

• Dalton

• Thomson

What is the key difference between elements, compounds, and mixtures?

• Elements are pure substances, compounds are chemically combined, mixtures are physically mixed

• Elements are chemically combined, compounds are physically mixed, mixtures are pure substances

• Elements are physically mixed, compounds are chemically bonded, mixtures are pure substances

• Elements are chemically bonded, compounds are physically mixed, mixtures are pure substances

Who discovered the electron and isotopes?

• Rutherford

• Thomson

• Bohr

• Dalton

What did Rutherford's Gold Foil Experiment prove?

• An atom consists of a central nucleus

• An atom is mostly empty space

• Electrons orbit the nucleus without losing energy

• Atoms are solid but invisible

Tags

NGSS.HS-PS1-8

What was the problem with Thomson's Plum Pudding model?

• It couldn't explain why negatively charged electrons remain in orbit

• It claimed that atoms with the same mass number are the same

• It showed that the electrons are surrounded by a 'pudding' of positive charges

• It demonstrated that the atom possessed a uniform positive background charge

Who refined Rutherford's planetary model and discovered energy levels?

• Democritus

• Dalton

• Thomson

• Bohr

What did Bohr's Planetary model fail to explain?

• Why atoms are solid but invisible

• Why atoms are mostly empty space

• Why negatively charged electrons remain in orbit

• Why the sum of mass of protons and electrons is far from the actual mass of an atom

What did Chadwick discover in 1932 that explained the mass differences in atoms?

• Neutron

• Proton

• Electron

• Isotope