Elements in periodic table show periodicity of properties. List any four such properties. Answer quickly please ! plz explain them a bit. only definitions of the properties is also enough. i would be thankful.
Answers
1)Ionization potential- the amount of energy required to donate or remove an electron from the outermost shell of an atom is called ionization potential
2)Atomic radius:-it is the distance between the nucleus and the outermost shell of an atom.
3)Electron affinity:- it is the amount of energy required to accept an electron from the outer most shell of an atom.
4)Electro negativity:- it is the tendency of an atom to attract electrons towards itself
Answer:
Trends in the periodic table :
1. VALENCY
Down the group:
all the elements of the same group have same valency.
along the period :
the valency increases from 1-4(till group 14) and decreases to 0 (group 15-18)
2. ATOMIC SIZE
Down the group:
the atomic radius increases as we go down the group as the no. of shells increases as the nuclear charge decrease and thus atomic size increases
along the period :
atomic radius decreases along the period because the nuclear charge increases and the nucleus of atom tends to pull the atom towards the center.
3. METALLIC CHARACTER :
Down the group:
metallic character increases down the group as they tend to lose electrons easily because the shells are farther away.
along the period :
metallic charge decreases and along the period nuclear charge increases.
4. NON-METALLIC CHARACTER :
Down the group:
down the group effective nuclear charge decreases as the valence electrons in the outer most shell are further away and this can be lost easily. Non-metallic character decreases
along the period :
effective nuclear charge increases along the period therefore it is difficult to lose electrons or non metallic character increases along the period
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