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What is the correct answer?

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Modem Periodic Law was given by

A. Joule

B. Moseley

C. Klechkosky

D. Meyer

Correct Answer :

B. Moseley


Related Questions

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Which of the following has highest ionisation energy?

A. Be

B. Cl

C. Ba

D. N

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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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The heaviest element is

A. Cs

B. Na

C. Hg

D. U

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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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Which of the following species have minimum size?

A. Br-

B. S-2

C. Ne

D. K+

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Elements belonging to the same period are

A. Si, N, O

B. Li, Be, Mg

C. Sc. Ti. V

D. Cu, Zn, Cd

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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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The lightest metal is

A. Li

B. Pb

C. Na

D. Al

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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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Which of the following has maximum electron affinity ?

A. Cl

B. Br

C. I

D. F

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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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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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The general electronic configuration of s-block elements is

A. ns1-2

B. ns2p6

C. ns1

D. ns0 to2

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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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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 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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Which of the following elements have maximum electronegativity?

A. Cl

B. Br

C. F

D. C

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The pair of elements that exhibit diagonal relationship is

A. Li-Mg

B. Al-Na

C. Ne-Ar

D. Si-P

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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 conform both cation and anion?

A. I

B. Cl

C. K

D. F

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Which of the following is an inert gas?

A. Oxygen

B. Nitrogen

C. Argon

D. Hydrogen

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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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Modem Periodic Law was given by

A. Joule

B. Moseley

C. Klechkosky

D. Meyer

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4

Which of the following has the maximum size?

A. Al-

B. Ne

C. Na+

D. F-

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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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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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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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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