Basic Chemistry Vocab Quiz

What is the smallest portion of an element, which is also the basic unit of matter?

• Molecule

• Atom

• Proton

• Electron

Which term describes anything that has mass and occupies space?

• Energy

• Matter

• Element

• Compound

What is a substance that cannot be separated into a simpler substance and consists entirely of one type of atom?

• Compound

• Mixture

• Element

• Solution

What is the center part of an atom that contains protons and neutrons called?

• Electron cloud

• Nucleus

• Shell

• Orbit

Which particle in an atom has a positive electrical charge?

• Electron

• Neutron

• Proton

• Ion

What is a negatively charged particle located in the space surrounding the nucleus?

• Proton

• Neutron

• Electron

• Ion

Which particle in an atom has no electrical charge?

• Proton

• Neutron

• Electron

• Ion

What is the term for the number equal to the number of protons in the nucleus of an atom?

• Atomic mass

• Atomic number

• Valence electrons

• Isotope

What is the sum of the number of protons and neutrons in an atom called?

• Atomic number

• Atomic mass

• Valence electrons

• Isotope

What are the electrons found in the outer energy level of an atom called?

• Core electrons

• Valence electrons

• Free electrons

• Bonding electrons