Element â 25: Manganese (Mn) : āĻŽā§āϞ â ⧍ā§Ģ: āĻŽā§āĻāĻāĻžāύāĻŋāĻ (Mn)
Basic Information(āĻŽā§āϞāĻŋāĻ āϤāĻĨā§āϝ)
- Atomic Number (āĻĒāĻžā§°āĻŽāĻžāĻŖā§ąāĻŋāĻ āϏāĻāĻā§āϝāĻž) → 25
- Nature (āĻĒā§ā§°āĻā§āϤāĻŋ) → Metal (āϧāĻžāϤā§)
Key Line (āĻā§ā§°ā§āϤā§āĻŦāĻĒā§āϰā§āĻŖ āĻŦāĻžāĻā§āϝ) : “Manganese is used to make strong steel and is important for health.” : “āĻŽā§āĻāĻāĻžāύāĻŋāĻā§ āĻļāĻā§āϤāĻŋāĻļāĻžāϞ⧠āĻāϏā§āĻĒāĻžāϤ āĻŦāύāĻžāĻŦāϞ⧠āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ āĻā§°ā§ āϏā§āĻŦāĻžāϏā§āĻĨā§āϝ⧰ āĻŦāĻžāĻŦā§ āĻā§ā§°ā§āϤā§āĻŦāĻĒā§āϰā§āĻŖāĨ¤”
Properties (āĻā§āĻŖāĻžāĻŦāϞā§)
- Manganese is a transition metal : āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻāĻāĻž transition metal (āϏāĻāĻā§āϰāĻŽāĻŖ āϧāĻžāϤā§)
- It is hard and brittle : āĻ āĻāĻ āĻŋāύ āĻā§°ā§ āĻāĻā§āĻā§ā§°
- Helps in strengthening steel : āĻāϏā§āĻĒāĻžāϤāĻ āĻŽāĻāĻŦā§āϤ āĻā§°ā§
- Used in metal production : āϧāĻžāϤ⧠āĻā§āĻĒāĻžāĻĻāύāϤ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ
- Required in small amounts by the body : āĻļā§°ā§ā§°ā§° āĻŦāĻžāĻŦā§ āĻ āϞā§āĻĒ āĻĒā§°āĻŋāĻŽāĻžāĻŖā§ āĻĒā§ā§°āϝāĻŧā§āĻāύā§āϝāĻŧ
Why is Manganese Important? (āĻā§ā§°ā§āϤā§āĻŦ āĻāĻŋāϝāĻŧ ?)
- Used in steel making : āĻāϏā§āĻĒāĻžāϤ āϤā§āϝāĻŧāĻžā§°āϤ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ
- Strengthens metals : āϧāĻžāϤā§āĻ āĻŽāĻāĻŦā§āϤ āĻā§°ā§
- Helps in body functions : āĻļā§°ā§ā§°ā§° āĻāĻžā§°ā§āϝā§āϝāϤ āϏāĻšāĻžāϝāĻŧ āĻā§°ā§
Atomic Structure(āĻĒāĻžā§°āĻŽāĻžāĻŖā§ąāĻŋāĻ āĻāĻ āύ)
- 25 protons (āĻĒā§ā§°ā§āĻāύ)
- 25 electrons (āĻāϞā§āĻā§āĻā§ā§°āύ)
Fun Fact(āĻāĻā§°ā§āώāĻŖā§āϝāĻŧ āϤāĻĨā§āϝ)
Manganese is essential for human health but only in small amounts. : āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻŽāĻžāĻ¨ā§ą āϏā§āĻŦāĻžāϏā§āĻĨā§āϝ⧰ āĻŦāĻžāĻŦā§ āĻĒā§ā§°āϝāĻŧā§āĻāύā§āϝāĻŧ, āĻāĻŋāύā§āϤ⧠āĻ āϤāĻŋ āĻāĻŽ āĻĒā§°āĻŋāĻŽāĻžāĻŖāϤāĨ¤
Quick Revision (āĻĻā§ā§°ā§āϤ āĻĒā§āύ⧰āĻžāĻŦā§āϤā§āϤāĻŋ)
- Atomic Number = 25
- Transition Metal
- Strengthens steel
- Hard & brittle
- Needed for health
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MCQ
Q1. What is the atomic number of Manganese (Mn) ? āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻ (Mn) ā§° āĻĒāĻžā§°āĻŽāĻžāĻŖā§ąāĻŋāĻ āϏāĻāĻā§āϝāĻž āĻāĻŋāĻŽāĻžāύ ?
Options: (a) 24 (b) 25 (c) 26 (d) 27
Ans: (b) 25
Explanation: Manganese has atomic number 25. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽā§āĻāĻāĻžāύāĻŋāĻā§° āĻĒāĻžā§°āĻŽāĻžāĻŖā§ąāĻŋāĻ āϏāĻāĻā§āϝāĻž 25āĨ¤
Q2. Manganese belongs to which type of element ? āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻā§āύ āϧ⧰āĻŖā§° āĻŽā§āϞ ?
Options: (a) Non-metal (b) Metalloid (c) Metal (d) Noble gas
Ans: (c) Metal
Explanation: Manganese is a metal. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻāĻāĻž āϧāĻžāϤā§āĨ¤
Q3. Manganese is mainly used in which industry ? āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻŽā§āϞāϤāĻ āĻā§āύ āĻāĻĻā§āϝā§āĻāϤ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧ ?
Options: (a) Textile (b) Steel (c) Agriculture (d) Plastic
Ans: (b) Steel
Explanation: Manganese is widely used in steel production. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻāϏā§āĻĒāĻžāϤ āϤā§āϝāĻŧāĻžā§°āϤ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻšāϝāĻŧāĨ¤
Q4. Manganese is a ______ metal. āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻāĻāĻž ______ āϧāĻžāϤā§āĨ¤
Options: (a) Alkali (b) Transition (c) Noble (d) Radioactive
Ans: (b) Transition
Explanation: Manganese is a transition metal. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻāĻāĻž āϏāĻāĻā§āϰāĻŽāĻŖ āϧāĻžāϤā§āĨ¤
Q5. Which property is correct for Manganese ? āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻā§° āĻā§āύāĻā§ āĻā§āĻŖ āϏāĻ āĻŋāĻ ?
Options: (a) Soft & flexible (b) Hard & brittle (c) Liquid (d) Gas
Ans: (b) Hard & brittle
Explanation: Manganese is hard and brittle. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻāĻ āĻŋāύ āĻā§°ā§ āĻāĻā§āĻā§ā§°āĨ¤
Q6. Manganese helps in making steel more ______. āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻā§ āĻāϏā§āĻĒāĻžāϤāĻ āĻ āϧāĻŋāĻ ______ āĻā§°ā§āĨ¤
Options: (a) Weak (b) Soft (c) Strong (d) Light
Ans: (c) Strong
Explanation: It strengthens steel. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻ āĻāϏā§āĻĒāĻžāϤāĻ āĻŽāĻāĻŦā§āϤ āĻā§°ā§āĨ¤
Q7. Manganese is required by the human body in ______ amount. āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻļā§°ā§ā§°āϤ ______ āĻĒā§°āĻŋāĻŽāĻžāĻŖāϤ āĻĒā§ā§°āϝāĻŧā§āĻāύāĨ¤
Options: (a) Large (b) Small (c) No (d) Toxic only
Ans: (b) Small
Explanation: It is needed in small amounts. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻ āĻ āϞā§āĻĒ āĻĒā§°āĻŋāĻŽāĻžāĻŖā§ āĻĒā§ā§°āϝāĻŧā§āĻāύāĨ¤
Q8. Number of protons in Manganese atom is ? āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻāϤ āĻĒā§ā§°ā§āĻāύ⧰ āϏāĻāĻā§āϝāĻž āĻāĻŋāĻŽāĻžāύ ?
Options: (a) 24 (b) 25 (c) 26 (d) 27
Ans: (b) 25
Explanation: Atomic number = number of protons = 25. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻĒā§ā§°ā§āĻāύ āϏāĻāĻā§āϝāĻž = 25āĨ¤
Q9. Which of the following is NOT a use of Manganese ? āĻĒā§ā§°āĻļā§āύ: āϤāϞ⧰ āĻā§āύāĻā§ āĻŽā§āĻāĻāĻžāύāĻŋāĻā§° āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āύāĻšāϝāĻŧ ?
Options: (a) Steel making (b) Strengthening metal (c) Body function (d) Fuel
Ans: (d) Fuel
Explanation: Manganese is not used as fuel. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻŽā§āĻāĻāĻžāύāĻŋāĻ āĻāύā§āϧāύ āĻšāĻŋāĻāĻžāĻĒā§ āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āύāĻšāϝāĻŧāĨ¤
Q10. Manganese improves the ______ of steel. āĻĒā§ā§°āĻļā§āύ: āĻŽā§āĻāĻāĻžāύāĻŋāĻā§ āĻāϏā§āĻĒāĻžāϤ⧰ ______ āĻāύā§āύāϤ āĻā§°ā§āĨ¤
Options: (a) Colour (b) Strength (c) Weight (d) Smell
Ans: (b) Strength
Explanation: It increases the strength of steel. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻ āĻāϏā§āĻĒāĻžāϤ⧰ āĻŽāĻāĻŦā§āϤāĻŋ āĻŦā§āĻĻā§āϧāĻŋ āĻā§°ā§āĨ¤
Quick Revision (āĻĻā§ā§°ā§āϤ āĻĒā§āύ⧰āĻžāĻŦā§āϤā§āϤāĻŋ)
- Atomic Number → 25
- Metal → Transition
- Use → Steel making
- Property → Hard & brittle
- Health → Needed in small amount