Chem 121 Final ACTUAL Questions and CORRECT Answers
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Course
Chem 121
Institution
Chem 121
Chem 121 Final ACTUAL Questions and
CORRECT Answers
Specific Heat equation - CORRECT ANSWER-
Electronegativity trend - CORRECT ANSWER-
Bond length - CORRECT ANSWER- The less bonds, the longer the bond length.
Single bonds are the longest.
Bond Strength - CORRECT ANSWER- More bonds, greater...
Chem 121 Final ACTUAL Questions and
CORRECT Answers
Specific Heat equation - CORRECT ANSWER- ✔✔
Electronegativity trend - CORRECT ANSWER- ✔✔
Bond length - CORRECT ANSWER- ✔✔The less bonds, the longer the bond length.
Single bonds are the longest.
Bond Strength - CORRECT ANSWER- ✔✔More bonds, greater strength.
Formal Charges - CORRECT ANSWER- ✔✔
Polar - CORRECT ANSWER- ✔✔A polar bond is a covalent bond between two atoms where
the electrons forming the bond are unequally distributed. This causes the molecule to have a
slight electrical dipole moment where one end is slightly positive and the other is slightly
negative.
Polar bonds are the dividing line between pure covalent bonding and pure ionic bonding.
Examples: Water is a polar bonded molecule.
A water molecule, abbreviated as H2O, is an example of a polar covalent bond. The electrons
are unequally shared, with the oxygen atom spending more time with electrons than the
hydrogen atoms. Since electrons spend more time with the oxygen atom, it carries a partial
negative charge.
Nonpolar - CORRECT ANSWER- ✔✔Nonpolar covalent bonds are a type of bond that
occurs when two atoms share a pair of electrons with each other. These shared electrons glue
two or more atoms together to form a molecule. Like children who share toys, atoms
involved in a nonpolar covalent bond equally share electrons.
, containing no permanently dipolar molecules; lacking a dipole.
Molecule which has no separation of charge, so no positive or negative poles are formed.
Examples: O2, CO2, N2
Covalent - CORRECT ANSWER- ✔✔A covalent bond is a chemical bond that involves the
sharing of electron pairs between atoms. These electron pairs are known as shared pairs or
bonding pairs and the stable balance of attractive and repulsive forces between atoms when
they share electrons is known as covalent bonding.
A covalent bond is a chemical link between two atoms in which electrons are shared between
them.
Examples:
There is a covalent bond between the oxygen and each hydrogen in a water molecule (H2O).
Each of the covalent bonds contains two electrons - one from a hydrogen atom and one from
the oxygen atom. Both atoms share the electrons.
Ionic - CORRECT ANSWER- ✔✔A chemical bond formed between two ions with opposite
charges. Ionic bonds form when one atom gives up one or more electrons to another atom.
These bonds can form between a pair of atoms or between molecules and are the type of bond
found in salts.
An ionic bond is a chemical link between two atoms caused by the electrostatic force
between oppositely-charged ions in an ionic compound.
Examples:
There is an ionic bond between the sodium and chloride ions in table salt, NaCl.
Hybridization of central atom XY2 - CORRECT ANSWER- ✔✔sp
Hybridization of central atom XY2Z - CORRECT ANSWER- ✔✔sp2
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