Dear Student,
The Decrease in atomic radius across the period not only depends upon the attraction between the nucleus and electrons. Rather it depends on the effective nuclear charge . It is the nuclear attraction acting on each electron. If the atomic number is say for example 5 that means there are 5 e-s and 5e+ this means that each electron will be attracted by 5 protons. But if the atomic number is 6,now there are 6 e- s and 6e+ this means each electron is pulled by 6 protons thereby leading to a decrease in atomic size.
I hope this clears the confusion!
Regards!
The Decrease in atomic radius across the period not only depends upon the attraction between the nucleus and electrons. Rather it depends on the effective nuclear charge . It is the nuclear attraction acting on each electron. If the atomic number is say for example 5 that means there are 5 e-s and 5e+ this means that each electron will be attracted by 5 protons. But if the atomic number is 6,now there are 6 e- s and 6e+ this means each electron is pulled by 6 protons thereby leading to a decrease in atomic size.
I hope this clears the confusion!
Regards!