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Periodic Properties in one Shot Video Lecture - One-Shot Videos for JEE
FAQs on Periodic Properties in one Shot
| 1. What are periodic properties in chemistry? |  |
Ans. Periodic properties refer to the trends and patterns in the physical and chemical characteristics of elements as observed in the periodic table. These properties include atomic radius, ionisation energy, electron affinity, and electronegativity, which vary predictably across periods and groups.
| 2. How does atomic radius change across a period and down a group? | |
Ans. Across a period from left to right, the atomic radius decreases due to the increasing nuclear charge which pulls the electrons closer to the nucleus. Conversely, down a group, the atomic radius increases as additional electron shells are added, which outweighs the effect of increased nuclear charge.
| 3. What is ionisation energy and how does it vary in the periodic table? | |
Ans. Ionisation energy is the energy required to remove an electron from an atom in its gaseous state. It generally increases across a period due to increasing nuclear charge and decreases down a group due to increased distance of the outermost electron from the nucleus and increased electron shielding.
| 4. Define electronegativity and explain its trend in the periodic table. | |
Ans. Electronegativity is the tendency of an atom to attract electrons in a chemical bond. It increases across a period from left to right owing to higher effective nuclear charge and decreases down a group as the distance between the nucleus and the bonding electrons increases, leading to reduced attraction.
| 5. What is the significance of understanding periodic properties for competitive exams like JEE? | |
Ans. Understanding periodic properties is crucial for competitive exams like JEE as it helps in predicting the behaviour of elements in chemical reactions, their bonding characteristics, and their reactivity. Mastery of these concepts enables students to solve problems efficiently and apply them in various contexts within chemistry.
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Apr 10, 2026 Last updated
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