Physical Science Exam

Fill in the blank: The smallest particle of an element which retains the properties of that element is called a(n) _________.

• Atom

• Molecule

• Electron

• Proton

Fill in the blank: The subatomic particle located in the nucleus of an atom that has a positive charge is called a(n) _________.

• Proton

• Electron

• Neutron

• Photon

Fill in the blank: The subatomic particle located in the nucleus of an atom that has a neutral charge is called a(n) _________.

• Neutron

• Proton

• Electron

• Positron

Fill in the blank: The subatomic particle located in the electron cloud surrounding the nucleus that has a negative charge is called a(n) _________.

• Electron

• Proton

• Neutron

• Positron

Fill in the blank: Particles that make up protons and neutrons are called _________.

• Quarks

• Electrons

• Photons

• Neutrons

Fill in the blank: The electrons in the outermost energy level of the electron cloud are called _________.

• Valence electrons

• Core electrons

• Protons

• Neutrons

Fill in the blank: The number of protons in an atom, which identifies the element and by which the periodic table is arranged, is called the _________.

• Atomic number

• Mass number

• Isotope number

• Valence number

Fill in the blank: The number of protons and neutrons in an atom is called the _________.

• Mass number

• Atomic number

• Isotope number

• Electron number

Fill in the blank: Atoms of the same element with different numbers of neutrons are called _________.

• Isotopes

• Ions

• Molecules

• Compounds

Fill in the blank: The weighted average of all the isotopes of a particular element, shown on the periodic table, is called the _________.

• Average atomic mass

• Atomic number

• Mass number

• Isotopic abundance