Q11. What is the symbol for nitrogen?
a) N
b) Ni
c) Ne
d) Na
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Correct Answer: a) N
Explanation: Nitrogen is represented by the symbol “N” in the periodic table. It is a crucial element for life and is abundant in the Earth’s atmosphere.
Q12. Which element’s symbol is “Mg”?
a) Magnesium
b) Manganese
c) Mercury
d) Molybdenum
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Correct Answer: a) Magnesium
Explanation: Magnesium is represented by the symbol “Mg” in the periodic table. It is a lightweight metal used in various applications, including alloy production and healthcare.
Q13. What is the symbol for sulfur?
a) Sf
b) Su
c) So
d) S
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Correct Answer: d) S
Explanation: Sulfur is represented by the symbol “S” in the periodic table. It is an essential element for life and is commonly found in minerals, proteins, and vitamins.
Q14. Which element’s symbol is “Pb”?
a) Lead
b) Lithium
c) Phosphorus
d) Potassium
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Correct Answer: a) Lead
Explanation: Lead is represented by the symbol “Pb” in the periodic table. It is a heavy metal with various industrial applications, although its use has declined due to its toxicity.
Q15. What is the symbol for helium?
a) He
b) Hl
c) Hm
d) Hn
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Correct Answer: a) He
Explanation: Helium is represented by the symbol “He” in the periodic table. It is a noble gas known for its low density and inert nature.
Q16. Which element’s symbol is “Si”?
a) Silver
b) Silicon
c) Sulfur
d) Selenium
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Correct Answer: b) Silicon
Explanation: Silicon is represented by the symbol “Si” in the periodic table. It is a crucial component of semiconductors and is widely used in electronic devices.
Q17. What is the symbol for mercury?
a) Me
b) Mc
c) Hg
d) Mr
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Correct Answer: c) Hg
Explanation: Mercury is represented by the symbol “Hg” in the periodic table. It is the only metal that is liquid at room temperature and is used in thermometers and fluorescent lights.
Q18. Which element’s symbol is “Al”?
a) Aluminum
b) Argon
c) Antimony
d) Arsenic
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Correct Answer: a) Aluminum
Explanation: Aluminum is represented by the symbol “Al” in the periodic table. It is a lightweight metal with widespread use in various industries, including construction and aerospace.
Q19. What is the symbol for calcium?
a) Cl
b) Ca
c) Ce
d) Cm
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Correct Answer: b) Ca
Explanation: Calcium is represented by the symbol “Ca” in the periodic table. It is essential for bone health, muscle function, and nerve signaling in the body.
Q20. Which element’s symbol is “Fe”?
a) Iron
b) Iodine
c) Indium
d) Francium
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Correct Answer: a) Iron
Explanation: Iron is represented by the symbol “Fe” in the periodic table. It is a crucial element for the formation of hemoglobin and is found in various foods.