Chemistry - Classification of Elements and Periodicity in Properties

Question - 1

Who among the following was the first to organise the elements according to same behavioural trends of elements?

  • A Newland
  • B Mendeleef
  • C Lother Meyer
  • D Dobereiner

Question - 2

Which basic concept was used by Mendeleef for organising the elements?

  • A He organised the metals only
  • B He organised the non-metals only
  • C He organised the both metals and non-metals according to increasing number of masses
  • D None of the above

Question - 3

The period number in the long form of the periodic table is equal to

  • A magnetic quantum number of any element of the period
  • B atomic number of any element of the period
  • C maximum principal quantum number of any element of the period
  • D maximum azimuthal quantum number of any element of the period

Question - 4

What will be the IUPAC name of element having Z=106?

  • A Unniquadium
  • B Unnilhexium
  • C Unnilheptium
  • D Ununhexium

Question - 5

The element with atomic number 35, 53 and 85 are all.....

  • A noble gases
  • B halogens
  • C heavy metals
  • D light metals

Question - 6

Any element having Z=33 belongs to the

  • A carbon family
  • B boron amily
  • C nitrogen family
  • D halogen family

Question - 7

Which of the following group elements belongs to chalcogens?

  • A N, P, As, Sb, Bi
  • B C, Si, Ge, Sn, Pb
  • C O,S,Se,Te, Po
  • D He, Ne, Ar, Kr, Xe, Rn

Question - 8

The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ....

  • A 1s2, 2s2, 2p6, 3s2, 3p6, 3d5, 4s2
  • B 1s2, 2s2, 2p6, 3s2, 3p6, 3d5, 4s2, 4p6
  • C 1s2, 2d2, 2p6, 3s2, 3p6, 3d6, 4s2
  • D 1s2, 2s2, 2p6, 3s2, 3p6, 3d6, 4s2

Question - 9

Which of the following is the correct order of size of the given species

  • A I>I-> I+
  • B I+ > I- > I
  • C I > I+ > I-
  • D I- > I > I+

Question - 10

Consider the isoelectronic species Na+, Mg2+, F- and O2-. The correct increasing order of their radii is .....

  • A F- < O2- < Mg2+ < Na+
  • B Mg2+ < Na+ < F- < O2-
  • C O2-<F-<Na+<Mg2+
  • D O2- < F- < Mg2+ < Na+