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4

The lightest metal is

A. Li

B. Pb

C. Na

D. Al

Correct Answer :

A. Li


Related Questions

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The general electronic configuration of s-block elements is

A. ns1-2

B. ns2p6

C. ns1

D. ns0 to2

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An element has atomic number 2. It belongs to

A. O group

B. III A group

C. VI group

D. II B group

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Which of the following did not find a place in Mendeleef's periodic table?

A. Fr

B. Na

C. Ce

D. CI

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Elements whose atoms have incompletely filled penultimate and anti-penultimate energy levels are known as

A. Inner Transition elements

B. Representative elements

C. Inert elements

D. Noble gases

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Modem Periodic Law was given by

A. Joule

B. Moseley

C. Klechkosky

D. Meyer

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The lightest metal is

A. Li

B. Pb

C. Na

D. Al

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4

The differentiating electron enters in the penultimate energy level in the case of

A. s block ele.

B. p block ele.

C. d block ele.

D. f block ele.

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Elements whose atoms have incompletely filled penultimate energy levels are known as

A. s-block elements

B. p-block elements

C. d-block elements

D. inert gases

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Ionisation energy of potassium is 425 kJ mol-1. The minimum frequency of a photon that can effect the ionisation is

A. 96.5×1015sec-1

B. 1.065×1014sec-1

C. 1.065×1012sec-1

D. 1.065×1015sec-1

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The smallest ion amongst the following

A. Si+++1

B. K+

C. At1+1

D. Mg+1

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With the increase in atomic number in a period of the periodic table

A. electron affinity decreases

B. metallic character decreases

C. ionisation energy decreases

D. atomic mass decreases

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Which of the following species have minimum size?

A. Br-

B. S-2

C. Ne

D. K+

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Which of the following conform both cation and anion?

A. I

B. Cl

C. K

D. F

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Law of octaves was given by

A. Meyer

B. Mendeleev

C. Moseley

D. Newland

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Which of the following has maximum ionisation energy?

A. Li

B. Ba

C. Cl

D. Be

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Arrange the following set of atoms in the increasing order of electron affinity: F, Sr, Ge, Se

A. Ge, Se, Sr. F

B. Se, Ge. Sr. F

C. Sr, Ge. Se. F

D. F, Sr, Ge. Se

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In a Lother Meyer curve sodium occurs at

A. bottom

B. peak

C. some point on the curve

D. middle of the curve

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The first atom with maximum number of d-electrons is with atomic number

A. 27

B. 46

C. 36

D. 29

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Arrange the following set of atoms in the order of increasing atomic radius : F, Cl, C, O

A. F, Cl, O, C

B. C. O, F, Cl

C. O. C, F, Cl

D. F, O, C, Cl

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In the periodic table on moving from left to right across a period, the metallic character of elements

A. increases

B. decreases

C. increases and decreases

D. remains the same

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Lother Meyer plotted a graph of

A. Atomic volume versus atomic number

B. Atomic radii versus atomic weight

C. Atomic weight versus mass number

D. Atomic volume versus atomic weight

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Which of the following atoms is paramagnetic?

A. Zn

B. N

C. Ca

D. Sr

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Which of the following is not an s-block element?

A. Ru

B. Be

C. Fr

D. Rb

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Which of the following have maximum size?

A. Cl

B. N2

C. F

D. Ne

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IV Period has.........elements.

A. 18

B. 36

C. 8

D. 9

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Second electron affinity of the elements is always

A. positive

B. negative

C. zero

D. more than first E.A.

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Which of the following has maximum electron affinity ?

A. Cl

B. Br

C. I

D. F

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The element with no definite place in the periodic table is

A. At

B. H

C. N

D. Pt

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On moving across a period from left to right the ionisation energy increases because

A. value of principal quantum number increases

B. effective nuclear charge increases

C. atomic size increases

D. nuclear charge increases

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The heaviest element is

A. Cs

B. Na

C. Hg

D. U