Question

Consultati tabelul periodic si aranjati in ordinea cresterii razei ionice urmatorii ioni:
a)F-,N3-,O2-
b)S2-,O2-,Se2-
c)Sc3+,Ca2+,Ti4+,K+
d)Na+,Cs+,Rb+,K+

Answer 1

a)F-,N3-,O2-

N(3-) > O(2-) > F(-)

<-----------------------

creste

b)S2-,O2-,Se2-

O(2-) < S(2-) < Se(2-)

--------------------------->

creste

c)Sc3+,Ca2+,Ti4+,K+

K(+) > Ca(2+) > Sc(3+) > Ti(4+)

<----------------------------------------

creste

d)Na+,Cs+,Rb+,K+

Na(+) < K(+) < Rb(+) < Cs(+)

------------------------------------>

creste