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Class 11 Chemistry (Part I) Chapter 3 Classification Of Elements And Periodicity In Properties Quiz 1 (25 MCQs)

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1. The number of elements known at present is .....
2. Arrange the following in proper order of size
3. Which block of modern predic table have all types of element i.e metal, nonmetal & metalloids
4. The electronic configuration of Gd$^{2+}$ is( At. no. of Gd is 64)
5. Which elements discovery was credit by both American and Soviet scientist
6. The atomic number of rubidium Indium, Gallium, xenon and antimony will be
7. Identify the symbol of element with atomic number 112
8. Element with atomic number 56 belongs to which block?
9. Which of the following have no unit?
10. In the modern periodic table, the number of period of the element is the same as
11. Who proposed periodic law for the first time
12. The factors affecting ionization enthalpy are
13. What is the correct iupac name for element with atomic number 114:
14. Isoelectronic species have .....
15. 18 group elements have highest ionization enthalpy because
16. The size of cation is ..... the size of parent atom
17. An element with atomic number 106 has been discovered recently. Which of the following electronic configurations will it possess?
18. Which group elements are called transition metals?
19. The general electronic configuration of d-block elements
20. The element with atomic number 117 if discovered would be placed in
21. General electronic configuration for 15 group element is
22. Which of the following is most reactive
23. 38 . Considering the elements B, Al, Mg, and K, the correct order of their metallic character is:
24. 16 group elements are called as calchogens because .....
25. Li resembles in its properties with ..... of 3rd period
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