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Amongst the element with following electronic configurations, which one may have the highest ionisation energy?
(a)
The element with [Ne]3s2p3 is the one having the highest ionization energy, because IE increases in a period from left to right. Moreover this element has half-filled p-electrons
Which pair of elements is chemically most similar?
Due to lanthanoid contactions.
Lanthanoid contraction is caused due to :
(d) It is the reason for given fact.
In the transition elements, the incoming electron occupies (n-1)d sublevel in preference to:
(a) The energy of (n-1)d-orbital is lower than np-orbital.And since electrons are filled according to energy, it first comes in n-1 d.
In a periodic table from I group to VII group electronegativity of elements:
(b) Effective nuclear charge increases along the period.
Which represents the electronic configuration of the most electropositive element?
Both (1) and represents the group I elements. the electropositive character increases down the group.
An element X is placed in group IA of the perodic table because it forms:
(c) I gp. elements forms ionic chloride.
Which one of the following is an amphoteric oxide?
(c) ZnO reacts with acids as well as with alkalies.
Elements which generally exhibit multiple oxidation states and whose ions in aqueous medium are usually coloured aand whose ions in aqueous medium are usually coloured are:
(b) A characteristic of transition elements.
Transition elements exhibit variable oxidation states because they release electrons from the following orbits:
(b)
because of energy difference between (n-1)d and ns is very low
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