CHEM 120 Exam 2 (Two) Prep & Study Guide with complete solutions | Latest 2025/2026 Update – Chamberlain.

CHEM 120 Exam 2 (Two) Prep & Study i,- i,- i,- i,- i,- i,- i,- i,-




Guide with complete solutions | Latest i,- i,- i,- i,- i,- i,-




2025/2026 Update – Chamberlain. i,- i,- i,-




Bond strength
i,- i,-i,- i,- single bond weaker then double bond weaker
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than triple bond
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Formal charge for each atom, the number of valence
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electrons-the number of electrons assigned in the molecule, the
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best structure has a formal charge that is closest to zero
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Formal charge guidelines
i,- the sum of the FC must equal thei,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,- i,-



overall charge of the molecule, C almost never appears with a
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lone pair, O almost never appears with a positive formal charge
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molecular geometry a description of the 3D arrangements of
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atoms within a molecule
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VSEPR valence shell electron pair replusion, a set or
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procedures for prediction the molecular geometry of a molecule
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using the molecules Lewis Structure
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,Chemical bond the attractive forces that holds two atoms
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together in a more complex unit i,- i,- i,- i,- i,-




ionic bond a chemical bond formed through the transfer of
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one or more electrons from one atom to another atom, metal and
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nonmetal


ionic compound i,- i,-i,- i,- a compound in which ionic bonds are
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present
valence electrons are transferred from a metal to a nonmetal,
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solid at room temperature
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covalent bond i,- i,-i,- i,- sharing of electrons, happens between two i,- i,- i,- i,- i,- i,-



nonmetals


molecular compound a compound in which covalent bonds
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are present, can be solid, liquid, or gas at room temperature
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molecule i,-i,- i,- basic unit of a compound of covalently bonded
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atoms


valence electrons look at the highest value of the electron
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shell number and the number of valence electrons
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, lewis symbol the chemical symbol of an element surrounded
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by dots equal in number to the number of valence electrons
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stable i,-i,- i,- lowest energy possible i,- i,-




localized electron model when forming bonds, atoms share
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electrons through an overlap of atomic orbitals (localized
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electron- electron stays close to where it started)
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Octet rule atoms tend to share electrons to achieve a noble
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gas configuration, that is a full octet of valence electrons
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Bonding electrons paris of valence electrons that are shared
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between atoms in a covalent bond i,- i,- i,- i,- i,-




Nonbonding electrons pairs of valence electrons on an atom
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that are not involved in electron sharing
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single covalent bond i,- a covalent bond in which two atoms i,- i,-i,- i,- i,- i,- i,- i,- i,- i,- i,-



share one pair of electrons
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