Which of the following element has the highest ionization energy.
Correct answer: C. N
- A. O
- B. C
- C. N
- D. Be
Explanation
Ionisation energy is the quantity of energy needed to remove an electron from an atom. The ionisation energy of an atom is directly proportional to the effective nuclear charge of an atom/ion. Hence, ionisation increases left to right in a period and is observed to be highest for noble gases. Also, there is an exception in the ionization energy trend for the 2nd and 5th groups due to half-filled orbitals, which have extra stability, so more energy is required to remove electrons. Hence the order is N>O>C>Be.The order of ionization energy in periods is:I-A<III-A<II-A<IV-A<VI-A<V-A<VII-A<VIII-A
Last updated
About Chemical Bonding
Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
Practise Chemical Bonding
964 free Chemical Bonding MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
50% inversion of configuration and 50% retention of configuration observed is characteristics of mechanism:
A bonding electron pair is attracted by of atoms?
A Cl₂ molecule is formed by the overlap of:
A co-ordinate covalent bond is present in:
A covalent bond formed by the parallel overlap of p-orbitals is a weaker bond called: