Multiple choice

Which of the following statements is/are TRUE?

  1. 4f orbital electrons are more shielded than 5f orbital electrons.
  2. Mn is the third most abundant transition element in earth’s crust.
  3. Zr and Hf have almost same atomic radius.
  4. Constantan is a copper-zinc alloy.

Select the correct answer.

  1. 1 and 2 only

  2. 1 and 4 only

  3. 2 and 3 only

  4. 2 and 4 only

  5. 3 and 4 only
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

5f orbital is more effectively shielded from nuclear charge than 4f orbital. Constantan is a copper-nickel alloy usually consisting of 55% copper and 45% nickel.

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