The Atom

Which subatomic particle has a positive charge?

• Electron

• Neutron

• Proton

• Photon

In a neutral atom, the number of protons equals the number:

• Electrons

• Neutrons

• Isotopes

• Nucleons

Tags

NGSS.MS-PS1-1

Which of the following subatomic particles has the least mass?

• Proton

• Neutron

• Electron

• Alpha particle

The energy levels in the Bohr model are:

• Continuous

• Discrete

• Variable

• Infinite

In the Bohr model, the electron's energy increases as it moves:

• Closer to the nucleus

• Further from the nucleus

• In a circular path

• Randomly

Which subatomic particle has a negative charge?

• Electron

• Neutron

• Proton

• Photon

Tags

NGSS.MS-PS2-3

What does the Bohr model primarily explain?

• Chemical bonding

• Electron configuration

• Nuclear reactions

• Light emission from atoms

Tags

NGSS.HS-PS1-4

NGSS.HS-PS4-3

What is the mass number of an atom?

• Total protons

• Total neutrons

• Total protons and neutrons

• Total electrons

The atomic number of an element is determined by the number of:

• Neutrons

• Electrons

• Protons

• Isotopes

Smallest mass of the 3 subatomic particles:

• Protons

• Neutrons

• Electrons