Multiple choice

The prediction of Mendeleev regarding the discovery of some elements were exact. Which of the following elements discovered were accommodated into the periodic table without disturbing it?

  1. Scandanium

  2. Noble gases

  3. Germanium

  4. Gallium

  5. All of these

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, this is the correct answer.