CBSE Class 10 Science 2016 Term II Outside Delhi Set 3

Question : 9 of 11

Marks: +1, -0

An element '

X

' belong to

3^{\;\text "rd "\;}

period and group 13 of the Modern Periodic Table.
(a) Determine the valence electrons and the valency of '

X

'.
(b) Molecular formula of the compound formed when '

X

' reacts with an element '

Y

' (atomic number

=8

).
(c) Write the name and formula of the compound formed when '

{\X}

' combines with chlorine.

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