what is periodicity in properties of element with refrence to the modern periodic table? why do all the elements of the same group have similar properties ? how does the tendency of elements to gain electrons change as we move from left to right in a period ? state the reason of this change
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(a) Reccurence of similar properties of elements after certain fixed interval of atomic number.
(b) They have similar properties because:
(i) They all have same number of valence electrons.
(ii) They all have same valency.
© The tendency to gain electrons increases due to increase in the nuclear charge. Due to this, atomic size decreases and a large number of valence electrons are held towards the nucleus and tendency to gain electrons increases.
(b) They have similar properties because:
(i) They all have same number of valence electrons.
(ii) They all have same valency.
© The tendency to gain electrons increases due to increase in the nuclear charge. Due to this, atomic size decreases and a large number of valence electrons are held towards the nucleus and tendency to gain electrons increases.
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