Parts of Atom

Multiple Choice

Which of the following is NOT a main subatomic particle found in atoms?

• Proton

• Neutron

• Electron

• Photon

Multiple Choice

Which subatomic particle is responsible for determining which element an atom is?

• Proton

• Neutron

• Electron

• Photon

Multiple Select

Select all correct statements about electrons.

• They are located in orbits around the nucleus.

• They have a positive charge.

• They are responsible for chemical bonding between atoms.

• Their mass is nearly zero.

Hotspot

Which arrow points to the protons?

Hotspot

Which arrow points to the neutrons?

Multiple Select

Which of the following statements about atomic number is correct?

• Atomic number equals the number of protons in an atom.

• Atomic number equals the number of neutrons in an atom.

• Atomic number equals the number of electrons in an atom.

• Each element has a unique atomic number

Open Ended

Why are electrons not included in the calculation of atomic mass?