Chemical Bonding SG v2020 3

Honors Chemistry.
Review CHEMICAL BONDING.
1) In the ionic network, cations are
surrounded by ___________________. How
many? _________________
2) When Ca 2+ combines with NO3 - , the ionic
compound formed has the formula:
9) What anion is contained in the following
compounds?
LiC2H3O2
Na2SO4
NH4NO3
10) When an octet is complete, which
orbitals are commonly filled?
3) Which elements in the periodic table tend
to form cations?
Anions?
11) Most ionic solids are very strong but at
the same time very fragile. How can you
explain this?
4) When an atom of strontium becomes an
ion, does it lose or gain electrons? How
many?
5) How’s the Lewis Dot structure for the
following atoms?
Cl Al O Na Ar
6) Define valence electrons.
12) What is being represented in the
following diagram? What property is this
The Water diagram Molecule talking and about? the Write dissolving a short process
paragraph describing what happens in
the diagram. Do all ionic substances have
this behavior?
Alcohol molecules are also polar, so water also dissolves alcohol
7) How do you easily know how many
valence electrons an atom has just
looking at the Periodic Table?
8) What metallic cation is contained in the
following compounds?
1
Ba(OH)2
Na2O
AlPO4

13) Draw the LDS for each of these molecules.
How many pairs of shared and unshared
electrons does the central atom in each
case have?
SE: Shared electron pairs
UE: Unshared electron pairs
H2O
NH3
SF4
SE
pairs
UE
pairs
15) Complete the following chart about
covalent bonds:
Type #e shared Strength Length
A-B
A=B
AºB
16) Show polarity in these bonds (arrow and
deltas)
C---O Br-----Br N-----H
C===O I-------Cl C-----H
17) Match the following options:
BF3
ICl3
Electrons evenly shared
Electron transferred
Electrons unevenly shared
Ionic bond
Covalent polar
Covalent non-polar
14) Evaluate the type of bond in each
situation, knowing the difference in
values of EN for the following pairs of
elements:
Case Diff. in EN Bond type
1) A--B 1.4
2) A--B 0.2
3) A--B 2.1
4) A--B 0
5) C and O
6) Ba and F
7) N and H
8) O and F

Substance →
Type of chemical bond
(ionic or covalent?)
Electron conf. (shortcut)
and number of Valence
electrons for each element
NF3
EN(N): 3.0 EN(F): 4.0
EN(Li)= 1.0
Li2O
EN(O)=3.5
CH3OH
EN(C)= 2.5 EN(O)=3.5
EN(H)=2.1
LDS
(Lewis Dot Structure)
If the bond is covalent, are
they polar or non-polar?
Leave this box blank if the
substance is ionic
If they are polar, show the
polarity with arrows and
d(+) and d(-)
How many unshared
electrons does the central
atom have in the structure?