Multiple choice

Which of the following elements has the highest first ionisation enthalpy?

  1. Scandium

  2. Chromium

  3. Manganese

  4. Copper

  5. Zinc

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

Zinc's first ionisation energy is 906 kJ/mol. Zinc has a very high first ionisation enthalpy because an electron has to be removed from 4s orbital of stable configuration (3d10 4s2).