Class IX

Group A elements are called
  1. metals
  2. alkali metals
  3. representative elements
  4. transition elements
Nobel gases are present in
  1. VIIA group
  2. VIA group
  3. VA group
  4. VIIIA group
In periodic table, helium is placed at
  1. top left corner
  2. bottom right corner
  3. bottom left corner
  4. top right corner
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
As we go from left to right across period, electron affinity
  1. increases
  2. decreases
  3. remains same
  4. none of above
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