Why does ionisation energy decrease down group 2?
As you descend group 2, more electrons are present in the atom. These electrons fill subshells at a greater energy level. There is a greater distance between the outer shell electron and the nucleus, as well as an increase in shielding, causing a weaker electrostatic force of attraction. Therefore, the electrons are held less tightly and are easier to lose.
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All answers ▸What is meant by the term optical isomerism?
Predict the number of peaks in a carbon-13 NMR spectrum of the following carbonyl isomers of C5H8O. (i) CH3CH2CH2CH2CHO (ii) (CH3)3CCHO (iii) CH3COCH(CH3)2
