COMPREHENSIVE MODULE 2 FINAL EXAM
PART 1 CERTIFICATION EVALUATION 2026
FULL SOLUTIONS GUARANTEED PASS
⩥ Proton. Answer: Charge: +1, Relative Mass: 1, Actual mass (kg):
1.673×10⁻²⁷, Location: Nucleus.
⩥ Neutron. Answer: Charge: 0, Relative Mass: 1, Actual mass (kg):
1.675×10⁻²⁷, Location: Nucleus.
⩥ Electron. Answer: Charge: -1, Relative Mass: 1/1836, Actual mass
(kg): 9.11×10⁻³¹, Location: Orbitals.
⩥ Atomic number (Z). Answer: Number of protons; defines the element.
⩥ Mass number (A). Answer: Protons + neutrons.
⩥ Isotope. Answer: Atoms of the same element with different neutron
numbers.
⩥ Isotopic abundance. Answer: Proportion of each isotope in a sample.
, ⩥ Relative atomic mass (Ar). Answer: Weighted mean considering
isotopes: Ar = (∑(%abundance × isotope mass)) / 100.
⩥ Mass spectrometry (TOF method). Answer: A method involving
ionisation, acceleration, time of flight, and detection to analyze isotopes.
⩥ Ionisation. Answer: The process of knocking out electrons (electron
impact) or attaching a proton (electrospray).
⩥ Acceleration. Answer: Ions are accelerated by an electric field.
⩥ Time of flight. Answer: v = √(2KE/m), where lighter ions arrive first.
⩥ Detection. Answer: Positive ions hit a detector, gain electrons, and
cause a measurable current.
⩥ Mole. Answer: One mole = amount containing Avogadro's number of
particles: NA = 6.022 × 10²³.
⩥ Relative molecular mass (Mr). Answer: Sum of Ar of atoms in a
molecule (covalent).
⩥ Relative formula mass. Answer: For ionic compounds with giant
lattices (no molecules).
PART 1 CERTIFICATION EVALUATION 2026
FULL SOLUTIONS GUARANTEED PASS
⩥ Proton. Answer: Charge: +1, Relative Mass: 1, Actual mass (kg):
1.673×10⁻²⁷, Location: Nucleus.
⩥ Neutron. Answer: Charge: 0, Relative Mass: 1, Actual mass (kg):
1.675×10⁻²⁷, Location: Nucleus.
⩥ Electron. Answer: Charge: -1, Relative Mass: 1/1836, Actual mass
(kg): 9.11×10⁻³¹, Location: Orbitals.
⩥ Atomic number (Z). Answer: Number of protons; defines the element.
⩥ Mass number (A). Answer: Protons + neutrons.
⩥ Isotope. Answer: Atoms of the same element with different neutron
numbers.
⩥ Isotopic abundance. Answer: Proportion of each isotope in a sample.
, ⩥ Relative atomic mass (Ar). Answer: Weighted mean considering
isotopes: Ar = (∑(%abundance × isotope mass)) / 100.
⩥ Mass spectrometry (TOF method). Answer: A method involving
ionisation, acceleration, time of flight, and detection to analyze isotopes.
⩥ Ionisation. Answer: The process of knocking out electrons (electron
impact) or attaching a proton (electrospray).
⩥ Acceleration. Answer: Ions are accelerated by an electric field.
⩥ Time of flight. Answer: v = √(2KE/m), where lighter ions arrive first.
⩥ Detection. Answer: Positive ions hit a detector, gain electrons, and
cause a measurable current.
⩥ Mole. Answer: One mole = amount containing Avogadro's number of
particles: NA = 6.022 × 10²³.
⩥ Relative molecular mass (Mr). Answer: Sum of Ar of atoms in a
molecule (covalent).
⩥ Relative formula mass. Answer: For ionic compounds with giant
lattices (no molecules).
