ICSE Class 10 Answered
what are trends in atomic size , ionisation potential ,on moving dow the group in periodic table.
Asked by karthik rao | 21 Jan, 2014, 04:29: PM
Expert Answer
Trends in Periodic Table:
Atomic size
In a group, the size of an atom increases as one proceeds from top to bottom. This is due to the successive addition of shells as we move from one period to the next in a group.
In Group I size of hydrogen is smallest and that of caesium is the largest.
H < Li < Na < K < Rb < Cs
37pm 152pm 186pm 231pm 244pm 262pm
Ionization potential
Ionization energy decreases with an increase in the atomic size, i.e., it decreases as one moves down a group.
Answered by Vaibhav Chavan | 24 Jan, 2014, 12:58: PM
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