Name_________________________________
HW-3a
Due Date:______________ Period_________
1. What is a chemical bond?___________________________________________________________________________
2-4. Determine the electronegativity difference, the probably bond type, and the more electronegative atom with
respect to bonds formed between the following pairs of atoms.
Elements Bonded
Sulfur & Oxygen
Electronegativity Difference
Bond Type
More-negative atom
Potassium & Chlorine
Selenium & Sulfur
Magnesium & Oxygen
5. The lattice energy of sodium chloride, NaCl, is -787.5 kJ/mol. The lattice energy of potassium chloride, KCl, is -715
kJ/mol. In which compound is the bonding between ions stronger?_______________ Explain:___________________
_________________________________________________________________________________________________.
6-8. Use electron-dot notation to illustrate the number of valence electrons present in one atom of each of the
following:
a.
O
b.
Fe(III)
c.
C
d.
Al
e.
Ca
d.
P
9-11. Use electron-dot structures to demonstrate the formation of ionic compounds involving the following:
a. Al and S
b. Ca and O
c. Na and S
12. Write the formulas for the binary ionic compounds formed between:
a. zinc & chloride
b. calcium & sulfur
13-14.
a. What is an ionic compound?_________________________________________________________________________
b. In what form do most ionic compound occur?___________________________________________________________
c. What is a formula unit?_____________________________________________________________________________
d. In general, what is the relationship of the electronegativities of elements to an ionic bond?______________________
__________________________________________________________________________________________________
15-16. Write the formulas for and give the names of the compounds formed by the following ions:
a. Cr2+ and Fb. Ni2+ & O2c. Fe+3 & SO42-
17. Write the formulas for each of the following:
a. strontium oxide
c. lithium nitride
b. magnesium chloride
d. iron(II) oxide
e. sodium thiosulfate pentahydrate
18-20. Complete the following charts:
Name
Chemical Formula
Tin nitrate
Chemical Formula
copper(I) phosphate
FePO4
Name
Name
Chemical Formula
N2O4
PBr3
FePO4