CHEM 1001/CHM1020/CHM1025C/CHM1032C Name: ___Answers___
Module Three Sample Pretest
Module Three: Part K Atomic Theory Vocabulary 10 points
Fill in the blank with the word(s) that best fit the description:
Electron_______1. A subatomic particle having negligible mass and a relative charge of one minus.
Orbital _______2. A region of space outside the nucleus where either zero, one, or
two electrons may populate.
Kernel or core__3. That part of the atom which does not take part in the ordinary
Nucleus _______4. The central part of an atom.
Neutron ______5. A neutral subatomic particle having an approximate mass of
Atomic Number _6. A number assigned to each element which defines the number of
protons in the nucleus of the atom.
Mass Number __7. A number assigned to each element which defines the total
Number of protons and neutrons found in the nucleus.
Isotope ________8. An element with the same atomic number but different mass
Ion ____________9. A charged atom (electrons and protons are NOT in balance)
Atomic mass____10. The weighted average mass of all the naturally occurring
Isotopes of an element.