Question

Successive ionisation energies of element is $738,1450,7730,10540,13630$ kJ/mole respectively. The element is?

• A. Na
• B. Mg
• C. Al
• D. K

Answer 1

Answer: (B)

Mg

• Second ionisation energy is defined by the equation: It is the energy needed to remove a second electron from each ion in 1 mole of gaseous 1+ ions to give gaseous 2+ ions. More ionisation energies. You can then have as many successive ionisation energies as there are electrons in the original atom.
  
• The element whose successive ionisation energies of element is 738,1450,7730,10540,13630 kJ/mole is Magnesium.