Chemistry Notes Ssc |verified| May 2026

definite shape and volume

Solid state chemistry for SSC and competitive exams focuses on the classification, properties, and structural arrangement of matter in its most rigid form. Unlike liquids or gases, solids have a because their constituent particles (atoms, ions, or molecules) are held together by strong intermolecular forces. 1. Classification of Solids

• Properties of Carbon: Allotropes (diamond, graphite, fullerenes), reactivity, and bonding.
• Types of Carbon Compounds: Hydrocarbons, carbohydrates, proteins, and fats.

• Definition: Atom = nucleus (protons+neutrons) + electrons.
• Key formula: λ = h/p ; E = -13.6 eV × (Z^2/n^2) (for hydrogen-like atoms).
• Electronic config rule: Aufbau, Pauli exclusion, Hund’s rule.
• Common Q: Write electronic config for Fe (26): 1s2 2s2 2p6 3s2 3p6 4s2 3d6.
• Quick tip: Remember 4s fills before 3d but remove 4s electrons first in cations.

NCERT Focus:

Stick to Class 9 and 10 NCERT Science books for the core concepts. chemistry notes ssc

Metals and Non-Metals:

Learn about ores, alloys (like brass and bronze), and the reactivity series. definite shape and volume Solid state chemistry for

Properties:

Metals are malleable and ductile; Non-metals are generally brittle. Definition: Atom = nucleus (protons+neutrons) + electrons

Key points:

• Weekly plan: cover 1–2 chapters, daily 45–60 minute focused sessions.
• After finishing a chapter: make a 1-page summary and 10 flashcards (questions on one side, answers on the back).
• Do past SSC papers twice: first as learning (with notes), second timed (no notes).
• Use active recall and spaced repetition: review flashcards at 1 day, 3 days, 7 days, 14 days.

Dalton's Atomic Theory

: Main postulates include that all elements consist of tiny particles called atoms, and atoms of a particular element are identical in mass and volume.