TS EAMCET 5-Aug-2021 Shift 1 Question Paper

For aluminium, electronic configuration is 1s2,2s22p63s23p1
Al‌⟶Al++e−→IE1
Al+‌⟶Al2++e−→IE2
Al2+‌⟶Al3++e−→IE3
If aluminium loses 3e−, it attains stable electronic configuration of neon which is 1s2,2s2,2p6.
So, aluminium can lose 3e−easily to get stabilise. and next IE will be higher.
According to question, the IE values are 5.98,18.8,28.4,120.1...
First three IE values are small so, the element is aluminium.