CHEM 104 EXAM PAPER 2025/2026 QUESTIONS AND
ANSWERS GUARANTEE A+
✔✔ABE notation - ✔✔VSPER Notation for molecular geometry
✔✔Bond Angles: seesaw - ✔✔120
✔✔Bond Angles: T-shaped - ✔✔180
✔✔AB₄E₁ - ✔✔seesaw
✔✔AB₂E₃ - ✔✔linear
✔✔AB₃E₂ - ✔✔seesaw
✔✔AB₅E₁ - ✔✔square pyramidal
✔✔AB₄E₂ - ✔✔square planar
✔✔hybridized orbitals - ✔✔sp orbitals, denoted by e- domains
✔✔hybrid orbitals: 2 e- domain - ✔✔sp hybridized
✔✔hybrid orbitals: 3 e- domains - ✔✔sp² hybridized
✔✔hybrid orbitals: 4 e- domains - ✔✔sp³ hybridized
✔✔hybrid orbitals: 5 e- domains - ✔✔sp³d hybridized
✔✔hybrid orbitals: 6 e- domains - ✔✔sp³d² hybridized
✔✔paramagnetic - ✔✔at least 1 e- unpaired in molecular orbitals
✔✔diamagnetic - ✔✔all e- paired in molecular orbitals
✔✔Proposed law of Octaves - ✔✔John Newlands
✔✔Mendeleev - ✔✔arranged all known elements by atomic mass
✔✔Mosley - ✔✔discovered atomic numbers and arranged them that way
✔✔Modern Periodic Table - ✔✔classification by electron shells
, ✔✔hydride - ✔✔something with H⁺ of H⁻ tacked on
✔✔oxide - ✔✔element with oxygen thrown on
✔✔Lanthanide Series - ✔✔58-71 (4f orbital)
✔✔Actinide Series - ✔✔90-103 (5f orbital)
✔✔Z-net - ✔✔net nuclear charge; nucleus's pull on the electrons; atomic number- core
e-;
✔✔Z-net across a period - ✔✔increases
✔✔Z-net down a group - ✔✔decreases
✔✔Z-eff - ✔✔more accurate predictor of nuclear charge; Z - shielding by core e-
✔✔isoelectronic series - ✔✔all elements ionize to same e- number
✔✔EN: F - ✔✔4
✔✔EN: H - ✔✔2.1
✔✔EN: S - ✔✔2.5
✔✔EN: back across period from F - ✔✔decreases by 1/2 (O is 3.5 etc)
✔✔1 atm = ______ torr - ✔✔760
✔✔1 atm = ______ kPa - ✔✔101
✔✔1 atm = ______ mm Hg - ✔✔760
✔✔Gay- Lussac's Law - ✔✔P₁/T₁ = P₂/T₂ (directly proportional)
✔✔R constant - ✔✔.08206 atm*L/mol*K
✔✔STP - ✔✔1 atm, 273K
✔✔density of a gas is in: - ✔✔g/L
✔✔ideal gas law is less ideal when: - ✔✔pressure increases, temperature decreases
ANSWERS GUARANTEE A+
✔✔ABE notation - ✔✔VSPER Notation for molecular geometry
✔✔Bond Angles: seesaw - ✔✔120
✔✔Bond Angles: T-shaped - ✔✔180
✔✔AB₄E₁ - ✔✔seesaw
✔✔AB₂E₃ - ✔✔linear
✔✔AB₃E₂ - ✔✔seesaw
✔✔AB₅E₁ - ✔✔square pyramidal
✔✔AB₄E₂ - ✔✔square planar
✔✔hybridized orbitals - ✔✔sp orbitals, denoted by e- domains
✔✔hybrid orbitals: 2 e- domain - ✔✔sp hybridized
✔✔hybrid orbitals: 3 e- domains - ✔✔sp² hybridized
✔✔hybrid orbitals: 4 e- domains - ✔✔sp³ hybridized
✔✔hybrid orbitals: 5 e- domains - ✔✔sp³d hybridized
✔✔hybrid orbitals: 6 e- domains - ✔✔sp³d² hybridized
✔✔paramagnetic - ✔✔at least 1 e- unpaired in molecular orbitals
✔✔diamagnetic - ✔✔all e- paired in molecular orbitals
✔✔Proposed law of Octaves - ✔✔John Newlands
✔✔Mendeleev - ✔✔arranged all known elements by atomic mass
✔✔Mosley - ✔✔discovered atomic numbers and arranged them that way
✔✔Modern Periodic Table - ✔✔classification by electron shells
, ✔✔hydride - ✔✔something with H⁺ of H⁻ tacked on
✔✔oxide - ✔✔element with oxygen thrown on
✔✔Lanthanide Series - ✔✔58-71 (4f orbital)
✔✔Actinide Series - ✔✔90-103 (5f orbital)
✔✔Z-net - ✔✔net nuclear charge; nucleus's pull on the electrons; atomic number- core
e-;
✔✔Z-net across a period - ✔✔increases
✔✔Z-net down a group - ✔✔decreases
✔✔Z-eff - ✔✔more accurate predictor of nuclear charge; Z - shielding by core e-
✔✔isoelectronic series - ✔✔all elements ionize to same e- number
✔✔EN: F - ✔✔4
✔✔EN: H - ✔✔2.1
✔✔EN: S - ✔✔2.5
✔✔EN: back across period from F - ✔✔decreases by 1/2 (O is 3.5 etc)
✔✔1 atm = ______ torr - ✔✔760
✔✔1 atm = ______ kPa - ✔✔101
✔✔1 atm = ______ mm Hg - ✔✔760
✔✔Gay- Lussac's Law - ✔✔P₁/T₁ = P₂/T₂ (directly proportional)
✔✔R constant - ✔✔.08206 atm*L/mol*K
✔✔STP - ✔✔1 atm, 273K
✔✔density of a gas is in: - ✔✔g/L
✔✔ideal gas law is less ideal when: - ✔✔pressure increases, temperature decreases
