Chemistry: Elements And Compounds
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Chemistry: Elements And Compounds
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25 Questions

1. Which of the following is the hardest element?
2. f-block elements are also called
3. The most electropositive element among the following is
4. The melting point of copper is
5. There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as
6. Aluminium is extracted from bauxite
7. Which of the following is not a compound of calcium?
8. Which of the following is incorrect?
9. Aluminium is extracted from bauxite
10. 'Plum Pudding Model'
11. The most abundant rare gas in the atmosphere is
12. The most malleable metal is
13. Which of the following is the hardest element?
14. f-block elements are also called
15. Which one of the following is the most characteristic property of an element?
16. The element first detected spectroscopically in the Sun's atmosphere is
17. An element with atomic number 36 belongs to the
18. Elements that show the properties of both metals and non-metals are called
19. The melting point of copper is
20. The most electronegative element among sodium, bromium, fluorine and oxygen is
21. The most electronegative element among sodium, bromium, fluorine and oxygen is
22. The ammonium ion is
23. The most malleable metal is
24. Elements that show the properties of both metals and non-metals are called
25. The atomic weight of uranium is

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