Determine the type of element in each compound as either metal (M), nor the bond type as lonic, Polar Covalent or Nonpolar Covalent, according to the type of atoms.
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
![1A
U3 Lesson 1 Check for Understanding
lonic vs. Covalent Bonds
Part ONE: Use the Electronegativity Chart to get the electronegativity values for this practice sheet
1. Determine the type of element in each compound as either metal (M), nonmetal (NM) or metalloid (META) and classify
the bond type as lonic, Polar Covalent or Nonpolar Covalent, according to the type of atoms.
Identical NM's
Different NM's
M/NM
Nonpolar Covalent
Polar covalent
lonic
2. Using the table of electro-negativities provided, calculate the difference in electronegativity and then classify the bond
type as lonic, Polar Covalent or Nonpolar Covalent according to the EN difference.
Nonpolar Covalent
0-0.4
0.41-1.69
> 1.70
Compound
SiS₂
NaCl
NH3
Li₂O
H₂O
Ca₂N₂
SO3
H₂
CuF
* CH4
Types of Atoms
META/NM
Polar Covalent
lonic
Bond Type
?
EN Difference
2.5-1.8=.7
Bond Type
Polar Covalent
FU
IM
Part TWO: Analysis
1. Do most predictions of bond type using electronegativity match to the prediction of bond type using types of atom?
4. What type of bond must always result between a diatomic or triatomic molecule?
BOL
2. What type of bond results from an electronegativity difference greater than 1.7 and consists of a metal and nonmet
3. What type of bond results from an electronegativity difference less than 1.7 and consists of only nonmetals?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1bb0dae6-a811-4f50-9198-d02945be0c9d%2F4bbe8be6-cf68-464a-801c-0ca3c4e33f12%2Fzz8jgc_processed.jpeg&w=3840&q=75)
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