Unit 4 - Atomic Structure and Properties

What is the central part of an atom called?

• Electron

• Proton

• Neutron

• Nucleus

Which particles are found in the nucleus of an atom?

• Electrons only

• Protons and Neutrons

• Neutrons and Electrons

• Protons and Electrons

What is the smallest unit of matter that retains the identity of a chemical element?

• Molecule

• Atom

• Compound

• Mixture

Which subatomic particle has a positive charge and is found in the nucleus of an atom?

• Electron

• Neutron

• Proton

• Photon

What is the term for the central part of an atom, containing protons and neutrons?

• Electron cloud

• Nucleus

• Shell

• Orbit

What is the unit used to express atomic and molecular weights?

• Gram

• Kilogram

• Atomic mass unit (amu)

• Pound

Tags

NGSS.HS-PS1-7

Which subatomic particle has no charge and is found in the nucleus of an atom?

• Proton

• Electron

• Neutron

• Positron

What is the negatively charged subatomic particle that orbits the nucleus of an atom?

• Proton

• Neutron

• Electron

• Positron

What is the term for the region around the nucleus where electrons are likely to be found?

• Electron cloud

• Nucleus

• Shell

• Orbit

What is the number of protons in the nucleus of an atom called?

• Atomic mass

• Atomic number

• Mass number

• Isotope number