CHM101

1. Stability of alkali salts depends on which of the following?_______________

2. The name given to group 2 elements in the periodic table is ________

3. How many elements are there in period 6 of the periodic table ? __________

4. Which of these elements has the electronic configuration of $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}$? __________

5. Which of the following is not true as we move down a group of s and p-block elements in the periodic table? ________

6. Which property was used by Mendeleev to classify elements?_______________

7. The phenomenon in which a metal is surrounded by solvent molecules is called ________

8. The tendency of an atom to attract towards itself shared electron pair of a bond is known as ________

9. Atoms of an element which have the same atomic number but different mass number is known as _________

10. Lithium in the form of lithium stearate is used for the production of a substance known as __________ which minimizes friction between moving parts.

11. Which of these is not a covalent hydride? ______

12. Alkaline metals are extracted mainly by _________

13. Which of these periods of the periodic table has only eight elements? ________

14. Hydrogen is discharged at ___________ electrode during the electrolysis of brine

15. Which of these statements is not true of metallic elements?_________

16. Which of these alkalis has the most stable fluoride?______________

17. Increase in principal quantum number(n) means _________ of the atomic radii

18. The attractive force which binds hydrogen atom of one molecule with an electronegative atom of another molecule is known as _________

19. Which of these alkali metals is the most electro-positive?______________

20. Hydride ion is unusually _________ with respect to size

21. _________ is a radioactive isotope of hydrogen obtained on a large scale by irradiation of Li/Mg alloy of $ LiFe{3}$ with slow neutrons.

22. _______ is a compound formed when hydrogen combines covalently with non-metals.

23. The percentage of deuterium in natural occurring hydrogen is ________

24. Within the alkali metals, atomic size _________ down the group.

25. Halogens have ________ electron affinity

26. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{7}4s^{2}$ is the electronic configuration for an element with atomic number ___________

27. Ortho and para-hydrogen exemplifies a type of isomerism referred to as __________ isomerism.

28. The stability of alkali salts depend on ______

29. The alkali metals belong to the _______ elements

30. Ionization energy ________ down the group within the alkali metals

31. Berylium , an alkaline earth metal belongs to the _______ block elements.

32. A consequence of _______ is the formation of a chelate ring.

33. The presence of hydrogen bond in most molecules is responsible for the following EXCEPT ________

34. The most abundant metal in sea water is called ______.

35. Which of these statements is not true of metallic hydrides? _______

_____states that as far as possible in a given atom in the ground state, electrons in the same sub shell will occupy different orbitals and will
have parallel spins.

37. The elements which the extra electron enters(n2)f orbitals are called ________

38. Magnesium hydride is an example of ________ hydride.

39. Hydrogen can be obtained economically as a bi-product in the electrolysis of a compound called ________

40. Elements which achieve a stable noble gas configuration by accepting just one electron are collectively called _______

41. Hydrides of alkali metals react with water to liberate which of these?______________

42. The f-blocks elements are otherwise known as ________

43. _________ metals react with sulphur to form simple sulphides and polysulphides.

44. An element that shows some properties similar to alkali metals and some others similar to those of halogens is most likely to be _________

45. Which of these elements behave partly as the alkaline metals as well as a halogen element? _________

46. Inner transition elements are otherwise known as ________

47. All these can be used as raw materials for the production of oxygen except ______

48. How many electrons are in potassium atom? __________

49. Fuel cell have advantage over power plants in that its efficiency is _________

50. Which of the isotopes of hydrogen is radioactive?_________