Multiple choice

Which of the following elements are placed along with cobalt in the same group in Mendeleev’s periodic table?

  1. Vanadium and Chromium

  2. Calcium and Potassium

  3. Nickel and Silver

  4. Nickel and Iron

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

In 1817, Johann Wolfgang Dobereiner, a German chemist, tried to arrange elements with similar properties into groups called triads having 3 elements each.