Vocab Quiz - Atomic Structure - Premium

What is the smallest unit of an element that retains the properties of that element?

• Atom

• Molecule

• Proton

• Electron

What is a pure substance made of only one kind of atom?

• Element

• Compound

• Mixture

• Solution

What is the dense center of the atom that contains protons and neutrons?

• Nucleus

• Electron cloud

• Valence shell

• Orbit

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

• Proton

• Electron

• Neutron

• Photon

What is a particle with no charge (neutral), located in the nucleus?

• Neutron

• Proton

• Electron

• Positron

What is a negatively charged particle that orbits the nucleus in energy levels?

• Electron

• Proton

• Neutron

• Photon

What is the area around the nucleus where electrons are likely to be found?

• Electron Cloud

• Proton Zone

• Neutron Field

• Nuclear Core

What are the fixed regions around the nucleus where electrons are arranged called?

• Energy Level (Shell)

• Protons

• Neutrons

• Orbitals

What are the electrons found in the outermost energy level that determine how an atom reacts called?

• Valence Electrons

• Core Electrons

• Protons

• Neutrons

What is the number of protons in an atom's nucleus that identifies the element?

• Atomic Number

• Mass Number

• Isotope Number

• Neutron Number