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21. valency of element =3-2=1
name - Lithium
22. mass number of X=6+6=12
mass number of Y=6+8=14
both X and Y are isotopes
23. octet rule describes that an atom should have a maximum of 8 electrons in its outermost shell so as to become stable.
name - Lithium
22. mass number of X=6+6=12
mass number of Y=6+8=14
both X and Y are isotopes
23. octet rule describes that an atom should have a maximum of 8 electrons in its outermost shell so as to become stable.
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21. If Z=3 I.e. atomic no. of element is 3
which implies that it's Electronic
configuration will be K(2) L(1)
valency of element would be 1
the element is lithium(Li)
23. Octet of electrons in the valence shell means that the outermost shell have reached it's limit to hold electrons
and completed it's objective to gain
noble gas configuration and hence became stable.
22. atomic = protons + neutrons
atomic mass of X=6+6= 12
atomic mass of Y=6+8= 14
Relation between X and Y:-
these are isotopes of Carbon.
Hope it helps you :)
which implies that it's Electronic
configuration will be K(2) L(1)
valency of element would be 1
the element is lithium(Li)
23. Octet of electrons in the valence shell means that the outermost shell have reached it's limit to hold electrons
and completed it's objective to gain
noble gas configuration and hence became stable.
22. atomic = protons + neutrons
atomic mass of X=6+6= 12
atomic mass of Y=6+8= 14
Relation between X and Y:-
these are isotopes of Carbon.
Hope it helps you :)
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