The correct setoff quantum numbers for the unpaired electron of scandium (Z = 21) is:
  • 3, 2, 3, ±1/2
  • 4, 2, 2, ±1/2
  • 3, 2, -2, ±1/2
  • 3, 1, 1, ±1/2
Which of the following elements does not exhibit the electrovalencey?
  • Chlorine
  • Calcium
  • Carbon
  • Sodium
While performing cathode ray experiments, it was observed that there was no passage of electric current under normal conditions. Which of the following can account for this observation?
  • Dust particles are present in air
  • Carbon dioxide is present in air
  • Air is a poor conductor of electricity under normal conditions
  • One of the above
How many electrons in a Hydrogen (H) atom:
  • one
  • two
  • four
  • three
The charge on an electron is equal to:
  • 1. 6 × 10C of -ve charge
  • 2. 6 × 10C of -ve charge
  • (i) and (ii)
  • None of the above
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0