the lightest metal in the periodic table is:

(1)H

(2)Mg

(3)Ca

(4)Li

Concept Questions :-

Modern Periodic Table
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Which electronic configurations represent to a transition element?

(a) 1s2, 2s2 2p6, 3s23p63d10, 4s24p6

(b) 1s2, 2s2 2p6, 3s23p63d10, 4s24p1

(c) 1s2, 2s2 2p6, 3s23p63d10, 4s2

(d) 1s2, 2s2 2p6, 3s23p6, 4s2

Concept Questions :-

Electronic Configuration
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Low melting point of manganese in the 1st transition series is due to:

(a) strong metallic bond due to d10 configuration

(b) weak metallic bond due to d5 configuration

(c) weak metallic bond due to d7 configuration

(d) none of the above

Concept Questions :-

Lattice/Hydration Energy
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Most common oxidation state of cerium (Ce) is :

(a) +2, +3

(b) +2, +4

(c) +3, +4

(d) +3, +5

Concept Questions :-

Electronic Configuration
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Which of the electronic configuration of an atom has the lowest ionization enthalpy? 

(1) 1s2,2s22p5

(2)1s2,2s22p3

(3)1s2,2s22p6,3s1

(4)1s2,2s22p6

Concept Questions :-

Ionization Energy (IE)
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A common trend to both groups I and II elements in the periodic table, as the atomic number increases are:

(1) oxidizing power increases

(2) atomic radius increases

(3) maximum valency increases

(4) reactivity with water increases

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The difference between ions and atoms is of:

(a) relative size

(b) Configuration

(c) presence of charge

(d) All of these

Concept Questions :-

Modern Periodic Table
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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 :

(a) continuous decrease

(b) continuous increase

(c) periodic one, an increase followed by a decrease

(d) periodic one, a decrease followed by an increase

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An element R forms the highest oxide R2O5. R belongs to:

(a) IV group

(b) V group

(c) VI group

(d) VII group

Concept Questions :-

Modern Periodic Table
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Amongst the element with following electronic configurations, which one may have the highest ionisation energy?

(a) [Ne]3s23p3

(b) [Ne]3s23p2

(c) [Ne]3d10,4s24p3

(d) [Ne]3s23p1

 

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