Chemistry, asked by stardoll44, 1 year ago

Why does silicon have a higher ionization energy than magnesium, even though magnesium has more penetration of electrons and sub shell stability in simple terms cos im new student to chem and dont understand vacant d etc? If mg has higher ioni than al cos it got stable then it should be gigher than silicon depsite no. protons increasing

Answers

Answered by joysonTP

keep in mind that ionisation energy increases across the period and decreases down the group. This is regarding the nuclear force of attraction.Across the period size of atom is small as nuclear force increases therefore it is difficult to remove the electron and more amount of energy is required

stardoll44: then why does aluminium have loweer ionsiationen energy than mg if it has more protons so more nuclear force? clearly it should have more?

stardoll44: i know the naswer is that mg has more stability as it has 3s2 but then it should be more stable than silicon

stardoll44: as silcon doesnt have full or half full shells

joysonTP: hi

joysonTP: here aluminium is having its first ionisation energy lesser than magnesium, this is due to the penetrating effect of inner electrons which is more for s orbitals than p than d,here in aluminium the first outer most electron is in p shell whereas mg in s therefore s orbitals penetrates more into nucleus than p and mg have more ionisation energy than Al

joysonTP: mg is an exceptional case from the normal style of periodic table, balance all follows ir

Answered by Anonymous

electron are more aggressive of silicon and have more kinetic energy

joysonTP: could you explain little more

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