CHAPTER: 03 PERIODICITY & PERIODIC TABLE

1.: Both of elements of 1st period contains valence electrons in

  1. M shell
  2. N shell
  3. K shell
  4. S shell

2: In periodic table, helium is placed at

  1. top left corner
  2. bottom right corner
  3. bottom left corner
  4. top right corner

3: Across period atomic size decreases due to

  1. shielding effect
  2. photoelectric effect
  3. increase in nuclear force of attraction
  4. decrease in nuclear force of attraction

4: First three periods are

  1. long periods
  2. short periods
  3. moderate periods
  4. none of above

5: On basis of electronic configuration group and period of 95B is

  1. 2 and IIIA
  2. 3 and IIA
  3. 4 and VIA
  4. 5 and VIIA

6: Chemical properties depends upon

  1. electronic configuration
  2. valence shell electronic configuration
  3. atomic mass
  4. none of above

7: Nobel gases are present in

  1. VIIA group
  2. VIA group
  3. VA group
  4. VIIIA group

8: Energy required to remove an electron from outermost shell is called

  1. potential energy
  2. kinetic energy
  3. mechanical energy
  4. ionization energy

9: As we go from top to bottom in a group shielding effect

  1. doesn’t change
  2. decreases
  3. increases
  4. none of above

10: Group A elements are called

  1. metals
  2. alkali metals
  3. representative elements
  4. transition elements

11: Period number of element indicates n

  1. value of all shells
  2. value of valence shell
  3. value of 1st shell
  4. none of above

12: Ability of atom to attract electrons towards itself is called

  1. electron affinity
  2. electronegativity
  3. ionization energy
  4. shielding effect

13: Average distance between nucleus and outer shell is called

  1. atomic size
  2. nuclear size
  3. shielding effect
  4. none of above

14: Horizontal rows of periodic table are called

  1. rows
  2. periods
  3. columns
  4. none of above

15: Shielding effect across period

  1. increases
  2. decreases
  3. becomes equal to above periods
  4. remains same

16: Period number of 2713Al is

  1. 1
  2. 2
  3. 4
  4. 3

17: In periodic table elements with similar valence shell configuration are placed in

  1. different groups
  2. same group
  3. can be placed any where
  4. none of above

18: When an electron is added in valence shell then

  1. energy is absorbed
  2. energy is released
  3. energy remains same
  4. force of attraction increases

19.  Value of ionization energy

  1. decreases down the group
  2. increases down the group
  3. remains same down the group
  4. none of above

20: Groups contain alkaline earth metals are

  1. IA
  2. IIIA
  3. IIA
  4. IVA

21: Physical properties depends on the

  1. size of atom
  2. size of proton
  3. size of neutron
  4. no. of electrons

22: Elements that lie in same column have

  1. similar properties
  2. different properties
  3. same physical properties
  4. different chemical properties

23: As we go from left to right across period, electron affinity

  1. increases
  2. decreases
  3. remains same
  4. none of above

24: Elements are arranged in order of

  1. decreasing atomic number
  2. decreasing atomic mass
  3. increasing atomic number
  4. increasing atomic mass