Periodic Properties-7 | 11th | IIT | NEET-Best IIT-JEE ,NEET Coaching In Varanasi.

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Periodic properties are a crucial part of chemistry, especially for competitive exams like IIT JEE and NEET. They help in understanding how elements behave in terms of their position in the periodic table. Here’s a brief overview of some key periodic properties you might encounter: Best IIT-JEE ,NEET Coaching In Varanasi.

1. Atomic Radius

  • Definition: The distance from the nucleus of an atom to the outermost electron shell. Best IIT-JEE ,NEET Coaching In Varanasi.
  • Trend:
    • Across a Period: Decreases from left to right due to increasing nuclear charge, which pulls electrons closer to the nucleus. Best IIT-JEE ,NEET Coaching In Varanasi.
    • Down a Group: Increases as additional electron shells are added, outweighing the effect of the increased nuclear charge. Best IIT-JEE ,NEET Coaching In Varanasi.

2. Ionization Energy

  • Definition: The energy required to remove an electron from an atom in the gas phase. Best IIT-JEE ,NEET Coaching In Varanasi.
  • Trend:
    • Across a Period: Increases from left to right because of the greater nuclear charge attracting electrons more strongly. Best IIT-JEE ,NEET Coaching In Varanasi.
    • Down a Group: Decreases as electrons are further from the nucleus and shielded by inner electrons. Best IIT-JEE ,NEET Coaching In Varanasi.

3. Electron Affinity

  • Definition: The energy change when an electron is added to a neutral atom in the gas phase. Best IIT-JEE ,NEET Coaching In Varanasi.
  • Trend:
    • Across a Period: Generally becomes more negative (more exothermic) as atoms become more eager to accept additional electrons. Best IIT-JEE ,NEET Coaching In Varanasi.
    • Down a Group: Becomes less negative because added electrons are further from the nucleus and are less attracted. Best IIT-JEE ,NEET Coaching In Varanasi.

4. Electronegativity

  • Definition: The ability of an atom to attract electrons in a chemical bond. Best IIT-JEE ,NEET Coaching In Varanasi.
  • Trend:
    • Across a Period: Increases from left to right as the effective nuclear charge increases.Best IIT-JEE ,NEET Coaching In Varanasi.
    • Down a Group: Decreases because additional electron shells reduce the nucleus’s attraction for bonding electrons. Best IIT-JEE ,NEET Coaching In Varanasi.

5. Metallic and Non-metallic Character

  • Trend:
    • Across a Period: Metallic character decreases (elements become more non-metallic). Best IIT-JEE ,NEET Coaching In Varanasi.
    • Down a Group: Metallic character increases (elements become more metallic). Best IIT-JEE ,NEET Coaching In Varanasi.

6. Reactivity

  • Metals:
    • Across a Period: Reactivity decreases as you move from left to right.
    • Down a Group: Reactivity increases. Best IIT-JEE ,NEET Coaching In Varanasi.
  • Non-metals:
    • Across a Period: Reactivity increases.
    • Down a Group: Reactivity decreases. Best IIT-JEE ,NEET Coaching In Varanasi.

7. Oxidation States

  • Elements exhibit varying oxidation states based on their position in the periodic table. Trends in oxidation states can often be related to the position within a period or group. Best IIT-JEE ,NEET Coaching In Varanasi.

Key Tips for IIT JEE and NEET:

  • Understand Trends: Knowing how each property changes across periods and down groups helps in predicting the behavior of elements. Best IIT-JEE ,NEET Coaching In Varanasi.
  • Practice Problems: Solve practice questions to familiarize yourself with interpreting periodic trends.
  • Conceptual Clarity: Make sure you understand why trends occur, not just memorize them. Best IIT-JEE ,NEET Coaching In Varanasi.

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