Retrieval Quiz 27

Place the following atomic models in order, from earliest to latest:

A) Rutherford B) Thomson C) Dalton

• B, C, A

• C, A, B

• A, C, B

• C, B, A

Which of the following is the best description of J.J. Thomson's model of the atom?

• a featureless, indivisible sphere

• a sphere of positive material with electrons embedded in it

• mostly empty space with electrons randomly orbiting around a positive nucleus

• mostly empty space with electrons located in set orbits around a positive nucleus.

Which of the following is a positively charged particle found in the nucleus of an atom?

• Electron

• Proton

• Neutron

• Quark

Which particle carries no charge?

• Neutrons

• Electrons

• Protons

Which is the smallest?

• electron
• proton
• atom
• neutron 

Tags

NGSS.5-PS1-1

Who discovered that atoms are mostly empty space?

• Dalton

• Thomson

• Rutherford

• Bohr

What is at the center of every atom?

• An electron
• A compound
• A molecule
• A nucleus

In an atom, what is the number of protons equal to?

• The number of electrons.
• The number of neutrons.
• The number of molecules.
• The number of nuclei.

A proton has this charge

• negative
• positive
• neutral

What is the mass number?

• the number of protons
• the sum of the number of protons and the number of neutrons in the nucleus of an atom 
• the number of electrons
• the number of neutrons