The electronic configuration of an element T is 2,8,8,1.
(a)What is the group number to T?
(b)What is the period number to T?
(c)How many valence electrons are there in an atom of T?
(d)What is the valency of T?
(e)Is it a metal or non metal?
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Answered by
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Element T has electronic configuration 2, 8, 8, 1 : this means
1s² 2s² 2p² 3s² 3p⁶ 4s¹
Since the number of electrons in the outer most shell (n = 4) is 1, it belongs to group 1.
Its outermost shell number is 4. SO period is 4.
There are 1 electrons in the outer most shell -> valence electrons = 1
Valency = 1
It is a metal. Because it ready to give away that electron to an acceptor.
In fact it is Potassium denoted by K ( atomic number 19).
1s² 2s² 2p² 3s² 3p⁶ 4s¹
Since the number of electrons in the outer most shell (n = 4) is 1, it belongs to group 1.
Its outermost shell number is 4. SO period is 4.
There are 1 electrons in the outer most shell -> valence electrons = 1
Valency = 1
It is a metal. Because it ready to give away that electron to an acceptor.
In fact it is Potassium denoted by K ( atomic number 19).
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Answered by
16
Although we do not need to mention the actual name of the element unless mentioned but for your information it is Potassium ( chemical symbol K ).
( a ) Since, T has 1 electron in its outermost orbit it must belong to group IA ( modern notation group 1 )
( b ) We see that T has 4 shells, hence it must belong to period 4.
( c ) The valence electrons are the number of electrons in the outermost shell of an atom. Here the valence electron is 1 in number.
( d ) Since, T has 1 electron in its valence shell, it will donate one electron to form cation. Hence, it will have the valency 1 + .
( e ) Since, it is donating electrons to complete octet, it is a metal.
( a ) Since, T has 1 electron in its outermost orbit it must belong to group IA ( modern notation group 1 )
( b ) We see that T has 4 shells, hence it must belong to period 4.
( c ) The valence electrons are the number of electrons in the outermost shell of an atom. Here the valence electron is 1 in number.
( d ) Since, T has 1 electron in its valence shell, it will donate one electron to form cation. Hence, it will have the valency 1 + .
( e ) Since, it is donating electrons to complete octet, it is a metal.
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