CHM101

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

2. Magnesium hydride is an example of ________ hydride.

3. How many electrons are in potassium atom? __________

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

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

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

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

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

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

10. __________ is one of the isotopes of hydrogen whose neutron number is zero.

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

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

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

14. Hydride ion is unusually _________ with respect to size

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

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

17. Halogens have ________ electron affinity

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

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

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

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

22. Alkaline metals are extracted mainly by _________

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

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

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

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

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

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

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

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

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

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

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

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

35. Inner transition elements are otherwise known as ________

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

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

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

39. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{7}4s^{2}$ is the electronic configuration for an element with atomic number ___________

40. The alkali metals belong to the _______ elements

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

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

43. Why was Newlands law of octaves rejected? ____________

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

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

_____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.

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

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

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

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