Q26. The heaviest metal is-
- Asilver
- BSleep
- CMercury
- DOsmium
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Answer: D) Osmium
Periodic Classification of Elements
44 MCQ questions with answers and explanations · page 2 of 2
Test yourself▶ 25 question test
Q27. The lightest metal is
- AMagnesium
- Baluminum
- CPlatinum
- DLithium
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Answer: D) Lithium
Q28. The lightest element is---
- Ahydrogen
- Bhelium
- CLithium
- Dsodium
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Answer: A) hydrogen
Q29. Which of the following elements is most electronegative?
- Aoxygen
- BFluorine
- Csodium
- Dchlorine
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Answer: B) Fluorine
Q30. 97.2% of the Earth's crust is made up of how many elements?
- A5
- B8
- C11
- D19
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Answer: B) 8
Q31. The most abundant metallic element on Earth is-
- AIron
- Baluminum
- Ccalcium
- Dsodium
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Answer: B) aluminum
Q32. The most abundant element on Earth is
- Aoxygen
- Bsilicon
- Caluminum
- Dpenis
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Answer: A) oxygen
Q33. The characteristic of transition elements is
- AIncomplete d-wintle
- BIncomplete f orbital
- Cincomplete p-orbital
- DOrbital(s) incomplete
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Answer: A) Incomplete d-wintle
Q34. What is the number of elements in the second period of the periodic table?
- A18
- B8
- C2
- D10
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Answer: B) 8
Q35. How many elements are there in the fifth period of the modern periodic table?
- A2
- B8
- C18
- D36
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Answer: C) 18
Q36. Who gave the symbol of the element?
- AJohn Dalton
- BLavoisier
- CVirgilius
- DRobert Boyle
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Answer: A) John Dalton
Q37. How many such elements are there in the periodic table in which the name of each element is symbolically represented by a single alphabet?
- A10
- B17
- C7
- D14
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Answer: D) 14
Q38. Which of the following is the symbol of 'Tin'?
- ATi
- Bsn
- Csi
- DTa
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Answer: B) sn
Q39. What is the atomic number of the element 'Einsteinium'?
- A98
- B100
- C99
- D101
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Answer: C) 99
Q40. Which element comes before carbon in the modern periodic table
- ALithium
- BMagnesium
- CBoron
- DBeryllium
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Answer: C) Boron
Q41. Two elements in the periodic table are named after France, one of them is francium. What is the other element?
- AFluorine
- BChromium
- CFermium
- DGallium
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Answer: C) Fermium
Q42. Which of the following scientists discovered the element Polonium?
- AF.W. Austen
- BMarie Curie
- CFrederick Jolliet
- DIrene Curie
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Answer: B) Marie Curie
Q43. From the following pairs of elements, choose the correct pair which are liquids at normal temperature and standard pressure?
- ABromine and Fluorine
- BMercury and Rubidium
- CBromine and Thallium
- DBromine and Mercury
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Answer: D) Bromine and Mercury
Q44. Which of the following sets of elements have the same valency?
- ANa, Mg, Ca
- BNa, Mg, Al
- CMg, Ca, K
- DMg, Ca, Ba
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Answer: D) Mg, Ca, Ba