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

                                 chemical reaction.

 

Nucleus _______4.  The central part of an atom.

 

Neutron   ______5.  A neutral subatomic particle having an approximate mass of

                                  1 amu

 

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

                                number.

 

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.