(i) An element X is placed in the 13th group and 3rd period of the Modern Periodic Table - Science - Periodic Classification of Elements

Question

(i) An element ?X? is placed in the 13th group and 3rd period of
the Modern Periodic Table
Answer the following questions stating reason for your answer in
each case:
(a)Write the electronic configuration of the element ?X?
(b)Write the formula of the compound formed when element ?X? reacts
with another element
?Y? of atomic number 17

Akanksha C. · Accepted Answer

Dear Student,

a) Electronic configuration of X = 2, 8, 3

It has 3 valence electron so it prefer to exists in +3 state

b) Atomic number of Y is 17

So its electronic configuration is 2,8, 7

It has 7 valence electron so it prefer to exists in -1 state

So formula of the compound is XY3

Regards