Class XI

In the modern periodic table
  1. The horizontal rows are called periods and the vertical columns, groups.
  2. The horizontal rows are called groups and the vertical columns, periods
  3. The horizontal rows are called periods and the vertical columns, series.
  4. The horizontal rows are called series and the vertical columns, groups.
Generally, the first ionization energy increases along a period including some exceptions. One which is NOT an exception is ______.
  1. Na and Mg
  2. Be and B
  3. N and O
  4. Mg and Al
d-Block Elements are characterized by the
  1. absence of d orbital electrons
  2. filling of inner d orbitals by electrons
  3. inner d orbitals are not filled
  4. filling of outer d orbitals
Maximum number of electrons occupied by s,p and d orbitlas are:
  1. 2, 2, 8
  2. 2, 6 and 10
  3. 2, 10, 10
  4. 2, 8, 8
Dmitri Mendeleev (1834-1907) and the German chemist, Lothar Meyer (1830-1895) proposed arranging elements in
  1. increasing order of their atomic numbers
  2. decreasing order of their atomic weights
  3. decreasing order of their atomic numbers
  4. increasing order of their atomic weights
Time Elapsed

HR : MIN : SEC
Question Answered
0
Score out of 100
0

Get Started!

we provide the best
services to our students

AmazingCounters.com Views

 

LKG - 12th

Rs 1,999  Annual
Plan
TOP