This section yields at least 2-3 questions directly.
Atomic size increases down a group and decreases across a period.
Group 18 (Inert gases like Helium, Neon, Argon). Halogens: Group 17 (Fluorine, Chlorine, Bromine). Trends: chemistry notes ssc
Discovered by E. Goldstein (named by Rutherford). Carries a positive charge ( C). Mass is
SSC often repeats questions. Analyze papers from the last 5 years. This section yields at least 2-3 questions directly
Total number of protons in the nucleus of an atom.
This is one of the highest-yielding topics for SSC examinations. Direct questions regarding properties and pH levels are common. Sour taste. Turn blue litmus paper red. Release Hydrogen ions ( H+cap H raised to the positive power ) in aqueous solutions. Strong Acids: HClcap H cap C l H2SO4cap H sub 2 cap S cap O sub 4 HNO3cap H cap N cap O sub 3 Weak Acids: CH3COOHcap C cap H sub 3 cap C cap O cap O cap H (Acetic acid), Citric acid. Bitter taste. Soapy touch. Turn red litmus paper blue. Release Hydroxyl ions ( OH−cap O cap H raised to the negative power Halogens: Group 17 (Fluorine, Chlorine, Bromine)
Chemistry Basics - Atoms, Molecules, Elements, Compounds, and Mixtures
For aspirants preparing for the Staff Selection Commission (SSC) exams—such as CGL, CHSL, MTS, CPO, or GD—the Science section can often be a game-changer. Among the three core subjects (Physics, Chemistry, Biology), is often perceived as the most scoring, yet memorization-heavy, discipline.
) react with water vapor in the air to form sulfuric and nitric acids. This rainfall typically has a pH lower than 5.6. Tips to Study Chemistry for SSC Exams