Multiple Choice Question Answer XX — task. Science CBSE, Class 9.

PDF chapter test TRY NOW

1. Which of the following electronic configurations does not obey Aufbau principle.

\(2s^1\), \(2p^4\)
\(2s^2\), \(2p^5\)
\(2s^2\), \(2p^5\)
\(2s^2\), \(2p^3\)

2. \(_{18}^{40}\textrm{Ar}\), \(_{19}^{40}\textrm{K}\), \(_{20}^{40}\textrm{Ca}\)

Isotopes
Isobars
Isotones
None of the above

Login or Fast registration

Previous exercise

Exit to the topic

Did you find an error?

Register for free to see more content

Register for free to see more content