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What is the correct answer?

4

The general electronic configuration of s-block elements is

A. ns1-2

B. ns2p6

C. ns1

D. ns0 to2

Correct Answer :

A. ns1-2


Related Questions

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4

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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4

Which of the following is an inert gas?

A. Oxygen

B. Nitrogen

C. Argon

D. Hydrogen

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4

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 successive ionisation energies of an atom of an element A are:
900 kJ mole1, 1757 kJ mole-1, 14850 kJ mole-1 respectively. The element is most likely to be

A. B

B. Be

C. F

D. Ba

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4

3.Atomic number of an element X is 34, it belongs to

A. IV period, VIA group

B. IV period, IIA group

C. V period, III B group

D. IV period, VII A group

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4

O2-, FF-, Na+ and Mg2+ are isoelectronic, the order of increasing size is

A. F-<Na+g++<O2-

B. F-<O2-<Na+<Mg++

C. Mg++<F-<Na+<O2-

D. Mg++<Na+<F-<O2-

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4

Which of the following species have minimum size?

A. Br-

B. S-2

C. Ne

D. K+

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4

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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4

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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4

The element with no definite place in the periodic table is

A. At

B. H

C. N

D. Pt

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The lightest metal is

A. Li

B. Pb

C. Na

D. Al

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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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4

Which of the following atoms is paramagnetic?

A. Zn

B. N

C. Ca

D. Sr

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Which of the following elements is not liquid at room temperature, i.e., 25°C?

A. Hg

B. Br

C. Cl

D. Cs

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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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4

Which of the following elements have maximum electronegativity?

A. Cl

B. Br

C. F

D. C

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4

Which of the following has maximum ionisation energy?

A. Li

B. Ba

C. Cl

D. Be

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Elements in the same vertical column has same

A. valence shell electronic configuration

B. electronic configuration

C. atomic number of isotopes

D. atomic size

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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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4

Which of the following has minimum ionisation energy?

A. F

B. Cl

C. Br

D. I

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4

The smallest ion amongst the following

A. Si+++1

B. K+

C. At1+1

D. Mg+1

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

A. 18

B. 36

C. 8

D. 9

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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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4

Which of the following have negative electron affinity?

A. Kr

B. U

C. Y

D. Pb

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4

The general electronic configuration of s-block elements is

A. ns1-2

B. ns2p6

C. ns1

D. ns0 to2

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4

Which of the following has minimum ionisation energy

A. Ca

B. In

C. Te

D. Rb

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4

Which of the following has maximum ionisation energy ?

A. Li

B. Be

C. C

D. B

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4

Which of the following have maximum size?

A. Cl

B. N2

C. F

D. Ne

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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