which of the these have ionisation spices have smallest radius Br,Sr+,Rb+,Se2-
Answers
Answered by
1
It can be seen that all the above ions are isoelectronic species. To determine the relative ion size in isoelectronic species follow the following steps :-
*Anions have the largest size in isoelectronic species.(because the negative charge on them tends to increase their size so that electrons are as far from each other as possible) .
*Cations have the smallest size in isoelectronic species.(because the nuclear force of attraction tends to have a greater effect on the remaining electrons and holds them closer to the nucleus than a neutral atom) .
*Greater is the atomic number smaller is the size as the nuclear force on electrons increases.
*Lesser is the atomic number greater is the size as the nuclear force is weaker on the electrons.
Hence by the above rules we can see that the order will be(in descending order i.e from largest to smallest) :-
Se2-
Br-
Kr
Rb+
Sr2+ .
*Anions have the largest size in isoelectronic species.(because the negative charge on them tends to increase their size so that electrons are as far from each other as possible) .
*Cations have the smallest size in isoelectronic species.(because the nuclear force of attraction tends to have a greater effect on the remaining electrons and holds them closer to the nucleus than a neutral atom) .
*Greater is the atomic number smaller is the size as the nuclear force on electrons increases.
*Lesser is the atomic number greater is the size as the nuclear force is weaker on the electrons.
Hence by the above rules we can see that the order will be(in descending order i.e from largest to smallest) :-
Se2-
Br-
Kr
Rb+
Sr2+ .
Answered by
0
Sorry I don’t know ♀️ the answer
Similar questions