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4

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

A. 18

B. 36

C. 8

D. 9

Correct Answer :

A. 18


Related Questions

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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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Modem Periodic Law was given by

A. Joule

B. Moseley

C. Klechkosky

D. Meyer

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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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Which of the following elements have maximum electronegativity?

A. Cl

B. Br

C. F

D. C

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An atom of an element has electronic configuration (Ar) 4s23d5, the element belongs to block

A. s

B. p

C. f

D. d

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Which of the following has maximum electron affinity ?

A. Cl

B. Br

C. I

D. F

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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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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 has the maximum size?

A. Al-

B. Ne

C. Na+

D. F-

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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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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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4

Which of the following have maximum size?

A. Cl

B. N2

C. F

D. Ne

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Law of octaves was given by

A. Meyer

B. Mendeleev

C. Moseley

D. Newland

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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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Which of the following conform both cation and anion?

A. I

B. Cl

C. K

D. F

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In the Mendeleef's periodic table properties of the elements are the periodic function of their

A. atomic weight

B. atomic number

C. atomic volume

D. none of these

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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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Which of the following has minimum ionisation energy?

A. F

B. Cl

C. Br

D. I

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Which of the following is an inert gas?

A. Oxygen

B. Nitrogen

C. Argon

D. Hydrogen

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

A. 18

B. 36

C. 8

D. 9

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4

Which of the following has highest ionisation energy?

A. Be

B. Cl

C. Ba

D. N

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The lightest metal is

A. Li

B. Pb

C. Na

D. Al

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Ionisation energy is the amount of energy required to remove

A. the most loosely bound electron from an isolated gaseous atom

B. an electron from an atom of an element

C. an electron from an isolated gaseous atom

D. an electron from covalently bonded atom in a molecule

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Which of the following have negative electron affinity?

A. Kr

B. U

C. Y

D. Pb

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In C, N, O and F the electronegativity

A. decreases from C to F

B. decreases from C to O and then increases to F

C. increases from O to C and then decreases to F

D. increases from C to 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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An element A has atomic number 7. It will have properties similar to the element with atomic number

A. 85

B. 57

C. 26

D. 51

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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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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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Which of the following has minimum ionisation energy

A. Ca

B. In

C. Te

D. Rb