CHEM 1001/CHM1020/CHM1025C/CHM1032C Name: ______________

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:

______________1. A subatomic particle having negligible mass and a relative mass of

one minus.

______________2. A region of space outside the nucleus where either zero, one, or

two electrons may populate.

______________3. That part of the atom which does not take part in the ordinary

chemical reaction.

______________4. The central part of an atom.

______________5. A neutral subatomic particle having an approximate mass of 1 amu

______________6. A number assigned to each element which defines the number of

protons in the nucleus of the atom.

______________7. A number assigned to each element which defines the total number

of protons and neutrons found in the nucleus.

______________8. An element with the same atomic number but different mass

number.

______________9. A charged atom (electrons and protons are NOT in balance)

_____________10. The weighted average mass of all the naturally occurring isotopes

of an element.

Below write the word and the definition which is in Corwin’s Chapters 5 and 6 but not one of the above: