write the electronic configuration of the elements X ( atomic number 13) and Y (atomic number 20)
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write the electronic configuration of the elements X ( atomic number 13) and Y (atomic number 20)
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Answer:
The atomic number of
X
=
20
The electronic configuration of
X
=
2
,
8
,
8
,
2
Since the valence shell of
X
contains two electrons in the valence shell. Therefore, it loses two-electron to attain noble gas configuration and forms a dispositive ion.
The atomic number of
Y
=
17
The electronic configuration of
Y
=
2
,
8
,
7
Since the valence shell of
Y
contains seven electrons in the valence shell. Therefore, it gains one electron to attain noble gas configuration and form an anion.
Hence, one atom of
X
combines with two atoms of
Y
to form a compound
X
Y
2
.
Since the bond is formed by the complete transfer of electrons. So, the bond is ionic in nature.
Electron - dot structure :
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Answer:
X is aluminium (13)
configuration - 2,8,3
Y is calcium (20)
configuration - 2,8,8,2