Chemistry

Important question related to ionisation energy:  Question 1 Ionisation energy of gases is higher. why? ans.  because of higher stable of ns^2 np^6 configuration. or noble gases have completely filled valence shell  whuchbis more stable. so removal of electron is very difficult. hence I. E of noble gases is high. Question 2 which have more ionisation energy Oxygen & nitrogen? ans O (8)    1s^2  2s^2  2p^4 N (7)    1s^2  2s^2  2p^3 Nitrogen has exactly half filled p subshell .whuch is more stable as a result removal electron becomes difficult. hence I. E of nitrogen is more than oxygen. hence peaks show half filled & completely filled subshell of atom .which  required more energy for removal of electron .hence I. E is more Question 3 First I. E of aluminum is less than magnesium. why? ans Al (13) 1s^2  2s^2  2p^6  3s^2 3p^1 Mg (12) 1s^2  2s^2  2p^6  3s^2 ...