Chemistry Essentials
Final Exam Review
Spring 2016
Answers
Part I Completion
Fill in the blanks with the word or phrase that best completes the sentence.
1. The _electron__ is the smallest atomic particle and is charged ___negatively______. It is found in the
_______electron cloud____.
2. When _electrons___ are added or removed from an atom, a (n) ion_ is formed.
3. An ion that contains more protons than electrons is called a (n) _cation__.
4. The __neutron_ is the largest atomic particle and has _no_ charge. It is found in the
_____nucleus_____
5. An ion that contains more electrons than protons is called a (n) _anion___.The existence of isotopes__
explains why the atomic masses for elements are not express as whole numbers.
6. The proton is slightly smaller than the ___neutron__, and is charged ____positively____. It is found in
the ___nucleus_____.
7. __Isotopes_________ of an element have the _same__ number of protons, but ___different____
numbers of ____neutrons_____.
8. A chemical equation is balanced by adding ____coefficients__ as needed.
9. At room temperature, bromine and mercury are ___liquids____.
10. At room temperature, there are 11 elements that exist as gases. They are H, He, N, O, F, Cl, Ne, Ar, Kr,
XE, and Rn_
____________________________________________________________________________________
__________________________________________________.
11. The diatomic elements are H2, N2, O2, F2, Cl2 Br2, and I2____
_______________________________________________________________________________________
__________________________________________________.
12. When a chemical equation is balanced, there are the _same_ types of atoms and the __same numbers of
each type of atom on both sides of the equation.
13. Balancing an chemical equation satisfies the _Law of Conservation of Matter__
______________________________________________.
14. When writing a chemical equation in standard form, _g_____ is used to indicate a gas.
15. When writing a chemical equation in standard form, l is used to indicate a liquid.
16. When writing a chemical equation in standard form, s__ is used to indicate a solid.
