Practice free Classification of elements and Periodicity in properties (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
A common trend to both groups I and II elements in the periodic table, as the atomic number increases are:
Atomic radii increases down the group.
The difference between ions and atoms is of:
The basic differences in an ion and its atom
On going down a main subgroup in the periodic table (example Li to Cs in IA or Be to Ba in IIA) the expected trend of change in atomic radius is a :
(b) Atomic radii increase down the group
An element R forms the highest oxide R2O5. R belongs to:
(b) R has five valency electrons like N.
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.
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