Atomic Structure 01

Question 1

Anomalies in 1st IE

Answer 1

between group 2 and group 13: Al has a lower IE than Mg

between group 15 and 16: S has a lower IE than P

Question 2

IE trend

Answer 2

Down the group: decreases due to increase in the number of quantum shells, hence the distance between the outermost electrons are further from the nucleus

Across Periods 2 and 3: increases due to effective nuclear charge increasing and shielding effect remaining relatively the same

Question 3

Atomic Radius trend

Answer 3

Down the group: decreases due to shielding effect increasing

across periods 2 and 3: decreases due to shielding effect remaining relatively constant while the effective nuclear charge increases

Question 4

Ionic Radius trend

Answer 4

Na+>Mg2+>Al3+

effective nuclear charge increases while shielding effect remains the same.