Chemistry 2015-2016
Ions and Ionic Bonding Practice
Name:
Date:
1) Identify the number of valence electrons vs. core electrons for the following:
Atom
Core Electrons
Valence Electrons
Rubidium
Krypton
Radium
Germanium
Chlorine
2) Draw the electron shell model for the following elements. Remember the rules!
a) Magnesium atom
b) Carbon atom
c) Sulfur ion
d) potassium atom bonding with fluorine atom
e) sodium atom(s) bonding with nitrogen atom(s) – for these draw valence shell only
f) beryllium atom(s) bonding with chlorine atom(s) – for these draw valence shell only
Per:
3) Provide each piece of information for element 33.
a. The element’s name and symbol.
__________________________________
b. The number of valence electrons.
______
c. The group number for this element.
______
d. The number of electron shells
______
e. The names of 2 other elements with the same number of valence electrons:
4) Determine the charge on the following atoms after electrons are transferred and write the symbol
for the ion.
Atom
Number of
Number of
Symbol for ion
protons
electrons
(include element
After transfer of
symbol and
electrons
charge)
Boron
Chlorine
Nitrogen
Strontium
Selenium
5) What is a cation? ___________________________________________________________
6) What is an anion? __________________________________________________________
7) Write out the ion symbols for each element and the formula for the compound formed in the table
below.
Compound
Symbol for Symbol for Compound formula
cation
anion
+
Example: Potassium iodide
K
IKI
a. Barium chloride
b. Calcium phosphide
c.
Sodium phosphide
d. Strontium chloride
e. Boron chloride
f. Lithium bromide
g. Sodium sulfide
h. Boron oxide
Write the symbol for the ion described.
8) What is one ion with an atomic number less than 36 and the same number of valence electrons as
Krypton?
9) What is one ion with an atomic number more than 36 and the same number of valence electrons
as Krypton?