Element / āĻŽā§āϞ: Zinc (Zn) / āĻāĻŋāĻāĻ (Zn)
Atomic Number / āĻĒā§°āĻŽāĻžāĻŖā§ āϏāĻāĻā§āϝāĻž: 30 / ā§Šā§Ļ
Nature / āĻĒā§ā§°āĻā§āϤāĻŋ: Metal / āϧāĻžāϤā§
Note: Zinc is a metal used to prevent rust and is important for good health. (āĻāĻŋāĻāĻ āĻāĻāĻž āϧāĻžāϤ⧠āϝāĻŋ āϞā§āĻšāĻžāϤ āĻŽā§°āĻŋāĻāĻž āϧ⧰āĻž ā§°ā§āϧ āĻā§°āĻŋāĻŦāϞ⧠āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ āĻā§°ā§ āϏā§āϏā§āĻŦāĻžāϏā§āĻĨā§āϝ⧰ āĻŦāĻžāĻŦā§āĻ āĻ āϤāĻŋ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§ā§°ā§āĻŖāĨ¤)
Points / āĻŦāĻŋāώāϝāĻŧāϏāĻŽā§āĻš
Bluish-white metal / āύā§āϞāĻž-āϧā§āϏ⧰ āĻŦāĻāĻž āϧāĻžāϤā§
Protects iron from rusting / āϞā§āĻšāĻžāϤ āĻŽā§°āĻŋāĻāĻž āϧ⧰āĻž ā§°ā§āϧ āĻā§°ā§
Used in galvanization / āĻā§āϝāĻžāϞāĻāĻžāύāĻžāĻāĻā§āĻāύāϤ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ
Used as a protective coating / āϏā§ā§°āĻā§āώāĻžāĻŽā§āϞāĻ āĻā§ąā§°āĻŖ āĻšāĻŋāĻāĻžāĻĒā§ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ
Important for the immune system / ā§°ā§āĻ-āĻĒā§ā§°āϤāĻŋā§°ā§āϧ āĻā§āώāĻŽāϤāĻžā§° āĻŦāĻžāĻŦā§ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§ā§°ā§āĻŖ
Used in protective coatings / āϏā§ā§°āĻā§āώāĻžāĻŽā§āϞāĻ āĻā§ąā§°āĻŖāϤ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ
Important for good health and the immune system / āϏā§āϏā§āĻŦāĻžāϏā§āĻĨā§āϝ āĻā§°ā§ ā§°ā§āĻ-āĻĒā§ā§°āϤāĻŋā§°ā§āϧ āĻā§āώāĻŽāϤāĻžā§° āĻŦāĻžāĻŦā§ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§ā§°ā§āĻŖ
Fact / āϤāĻĨā§āϝ: Zinc is used to protect iron from corrosion. It also helps the body fight infections. (āĻāĻŋāĻāĻ āϞā§āĻšāĻžāĻ āĻā§āώāϝāĻŧ (Corrosion)ā§° āĻĒā§°āĻž āϏā§ā§°āĻā§āώāĻž āĻĻāĻŋāϝāĻŧā§āĨ¤ āĻ āĻļā§°ā§ā§°āĻ āϏāĻāĻā§ā§°āĻŽāĻŖā§° āĻŦāĻŋā§°ā§āĻĻā§āϧ⧠āϝā§āĻāĻāĻŋāĻŦāϞā§āĻ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤)
MCQs
1. What is the atomic number of Zinc (Zn)? / āĻāĻŋāĻāĻ (Zn)-ā§° āĻĒā§°āĻŽāĻžāĻŖā§ āϏāĻāĻā§āϝāĻž āĻāĻŋāĻŽāĻžāύ? A) 29 B) 31 C) 30 D) 32 Ans / āĻāϤā§āϤ⧰: C) 30
Explanation: Zinc has 30 protons, so its atomic number is 30. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŋāĻāĻā§° ā§Šā§ĻāĻāĻž āĻĒā§ā§°āĻāύ āĻĨāĻžāĻā§, āϏā§āϝāĻŧā§āĻšā§ āĻāϝāĻŧāĻžā§° āĻĒā§°āĻŽāĻžāĻŖā§ āϏāĻāĻā§āϝāĻž ā§Šā§ĻāĨ¤
2. Zinc is a ________. / āĻāĻŋāĻāĻ āĻāĻāĻž ________āĨ¤ A) Non-metal B) Gas C) Metal D) Liquid Ans / āĻāϤā§āϤ⧰: C) Metal (āϧāĻžāϤā§) Explanation: Zinc is a bluish-white metal. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŋāĻāĻ āĻāĻāĻž āύā§āϞāĻž-āϧā§āϏ⧰ āĻŦāĻāĻž āϧāĻžāϤā§āĨ¤
3. Zinc is mainly used to protect iron from ________. / āĻāĻŋāĻāĻ āĻŽā§āϞāϤāĻ āϞā§āĻšāĻžāĻ āĻāĻŋāĻšā§° āĻĒā§°āĻž āϏā§ā§°āĻā§āώāĻž āĻĻāĻŋāĻŦāϞ⧠āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ? A) Fire B) Heat C) Rusting (Corrosion) D) Water Ans / āĻāϤā§āϤ⧰: C) Rusting (Corrosion) / āĻŽā§°āĻŋāĻāĻž āϧ⧰āĻž Explanation: Zinc coating prevents iron from rusting. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŋāĻāĻā§° āĻā§ąā§°āĻŖā§ āϞā§āĻšāĻžāϤ āĻŽā§°āĻŋāĻāĻž āϧ⧰āĻž ā§°ā§āϧ āĻā§°ā§āĨ¤
4. The process of coating iron with zinc is called ________. / āϞā§āĻšāĻžā§° āĻāĻĒā§°āϤ āĻāĻŋāĻāĻā§° āĻā§ąā§°āĻŖ āĻĻāĻŋāϝāĻŧāĻžā§° āĻĒā§ā§°āĻā§ā§°āĻŋāϝāĻŧāĻžāĻ āĻāĻŋ āĻāϝāĻŧ? A) Melting B) Welding C) Galvanization D) Polishing Ans / āĻāϤā§āϤ⧰: C) Galvanization (āĻā§āϝāĻžāϞāĻāĻžāύāĻžāĻāĻā§āĻāύ) Explanation: Galvanization protects iron from corrosion by coating it with zinc. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻā§āϝāĻžāϞāĻāĻžāύāĻžāĻāĻā§āĻāύāϤ āϞā§āĻšāĻžā§° āĻāĻĒā§°āϤ āĻāĻŋāĻāĻā§° āĻā§ąā§°āĻŖ āĻĻāĻŋ āĻā§āώāϝāĻŧā§° āĻĒā§°āĻž āϏā§ā§°āĻā§āώāĻž āĻĻāĻŋāϝāĻŧāĻž āĻšāϝāĻŧāĨ¤
5. How many electrons are present in a neutral zinc atom ? / āĻāĻāĻž āύāĻŋā§°āĻĒā§āĻā§āώ āĻāĻŋāĻāĻ āĻĒā§°āĻŽāĻžāĻŖā§āϤ āĻāĻŋāĻŽāĻžāύāĻāĻž āĻāϞā§āĻā§āĻā§ā§°āύ āĻĨāĻžāĻā§ ? A) 29 B) 30 C) 31 D) 32 Ans / āĻāϤā§āϤ⧰: B) 30 Explanation: A neutral zinc atom has 30 electrons, equal to its protons. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻāĻž āύāĻŋā§°āĻĒā§āĻā§āώ āĻāĻŋāĻāĻ āĻĒā§°āĻŽāĻžāĻŖā§āϤ ā§Šā§ĻāĻāĻž āĻāϞā§āĻā§āĻā§ā§°āύ āĻĨāĻžāĻā§, āϝāĻŋ āĻĒā§ā§°āĻāύ⧰ āϏāĻāĻā§āϝāĻžā§° āϏāĻŽāĻžāύāĨ¤
6. Zinc is important for the ________. / āĻāĻŋāĻāĻ āĻāĻŋāĻšā§° āĻŦāĻžāĻŦā§ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§ā§°ā§āĻŖ? A) Digestive system B) Nervous system C) Immune system D) Respiratory system Ans / āĻāϤā§āϤ⧰: C) Immune system (ā§°ā§āĻ-āĻĒā§ā§°āϤāĻŋā§°ā§āϧ āĻā§āώāĻŽāϤāĻž) Explanation: Zinc helps the body's immune system fight infections. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻāĻŋāĻāĻā§ āĻļā§°ā§ā§°ā§° ā§°ā§āĻ-āĻĒā§ā§°āϤāĻŋā§°ā§āϧ āĻā§āώāĻŽāϤāĻž āĻŦā§āĻĻā§āϧāĻŋ āĻā§°āĻŋ āϏāĻāĻā§ā§°āĻŽāĻŖā§° āĻŦāĻŋā§°ā§āĻĻā§āϧ⧠āϝā§āĻāĻāĻŋāĻŦāϞ⧠āϏāĻšāĻžāϝāĻŧ āĻā§°ā§āĨ¤