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🇵🇰 HEC USAT · subject
HEC USAT Chemistry Syllabus
Every chapter and topic of Chemistry examined in HEC USAT — 6 chapters, 19 topics, plus 50 flashcards written against it.
Chemistry syllabus — full chapter and topic list
Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Chemistry in HEC USAT, not a summary of it.
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Atomic Structure
3 topics- Subatomic Particles
- Electronic Configuration
- Periodic Table and Periodicity
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Chemical Bonding
3 topics- Ionic and Covalent Bonds
- Molecular Geometry
- Intermolecular Forces
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States of Matter
3 topics- Gas Laws
- Liquids and Solids
- Phase Changes
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Physical Chemistry
4 topics- Stoichiometry
- Chemical Equilibrium
- Thermochemistry
- Reaction Kinetics
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Solutions and Acids and Bases
3 topics- Concentration Units
- pH and Buffers
- Electrochemistry
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Organic Chemistry
3 topics- Hydrocarbons
- Functional Groups
- Alcohols, Aldehydes and Acids
Chemistry flashcards for HEC USAT
21 of 50 cards from the Chemistry deck — real questions with worked answers.
What are the three main subatomic particles, and what is the relative charge of each?
Proton (+1), neutron (0), and electron (−1).
Where in the atom is nearly all the mass concentrated, and which particles contribute to it?
In the nucleus, contributed by protons and neutrons (the electron mass is negligible).
What does the atomic number (Z) of an element represent?
The number of protons in the nucleus (and the number of electrons in a neutral atom).
What is the mass number (A) of an atom?
The total number of protons plus neutrons in the nucleus (A = Z + number of neutrons).
What are isotopes?
Atoms of the same element with the same number of protons but different numbers of neutrons (same Z, different mass number).
State the maximum number of electrons a shell can hold in terms of its principal quantum number n.
2n² electrons (e.g., n=1 holds 2, n=2 holds 8, n=3 holds 18).
What is the Aufbau principle?
Electrons fill atomic orbitals in order of increasing energy, lowest-energy orbitals first.
State the Pauli exclusion principle.
No two electrons in an atom can have the same set of four quantum numbers; an orbital holds at most two electrons with opposite spins.
State Hund's rule of maximum multiplicity.
Electrons occupy degenerate (equal-energy) orbitals singly with parallel spins before pairing up.
How many electrons can s, p, d, and f subshells hold respectively?
s = 2, p = 6, d = 10, f = 14 electrons.
Write the ground-state electronic configuration of a neutral chlorine atom (Z = 17).
1s² 2s² 2p⁶ 3s² 3p⁵.
What is the order of orbital filling for the first few orbitals according to the (n+l) rule?
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...
In the periodic table, what does a period (horizontal row) correspond to?
The highest principal quantum number (n) / outermost occupied shell of the elements in that row.
What does a group (vertical column) of the periodic table indicate about its elements?
Elements have the same number of valence electrons and therefore similar chemical properties.
Name the four main blocks of the periodic table.
The s-block, p-block, d-block (transition metals), and f-block (lanthanides and actinides).
How does atomic radius generally change across a period (left to right) and down a group?
It decreases across a period and increases down a group.
Define ionization energy.
The energy required to remove the most loosely bound (outermost) electron from a gaseous atom or ion.
How does first ionization energy generally trend across a period and down a group?
It increases across a period and decreases down a group.
Define electronegativity and name the most electronegative element.
The tendency of an atom to attract a shared pair of electrons in a bond; fluorine is the most electronegative.
How does electron affinity generally trend across a period?
It generally becomes more negative (energy released increases) across a period from left to right.
What is an ionic bond and how does it form?
An electrostatic attraction between oppositely charged ions, formed by the transfer of electrons from a metal to a non-metal.
Planning Chemistry for HEC USAT
Chemistry is about 13% of the HEC USAT syllabus by topic count — 19 of 143 topics, spread over 6 chapters. At roughly 45 minutes per topic plus 12 minutes per sub-topic, a first pass runs to about 15 hours.
The heaviest chapters are Physical Chemistry (4 topics), Atomic Structure (3 topics), Chemical Bonding (3 topics) . Front-load those while your energy is high; the short chapters are better revision filler later.
Work top-down: read the chapter, then tick topics off individually rather than marking the whole chapter done. Sub-topics are where silent gaps hide.
Chemistry (HEC USAT) FAQ
What is in the HEC USAT Chemistry syllabus?
Chemistry is split into 6 chapters — Atomic Structure, Chemical Bonding, States of Matter, Physical Chemistry, Solutions and Acids and Bases and Organic Chemistry, containing 19 topics and 0 sub-topics in total.
How many chapters are there in Chemistry for HEC USAT?
6 chapters. Chemistry accounts for about 13% of the topics in the whole HEC USAT syllabus (19 of 143).
How long should I spend on Chemistry for HEC USAT?
Budget around 15 hours for a first pass through Chemistry — about 45 minutes per topic plus 12 minutes per sub-topic across its 19 topics. Add revision cycles on top.
Are there flashcards for HEC USAT Chemistry?
Yes — a 50-card Chemistry deck. Sample cards are printed on this page, and the full deck is free in the Examius app with spaced repetition scheduling.