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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.

Correct Answer :

A. s block ele.


Related Questions

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4

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 has maximum electron affinity ?

A. Cl

B. Br

C. I

D. F

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4

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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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

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

A. 18

B. 36

C. 8

D. 9

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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

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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4

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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4

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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4

Which of the following have maximum size?

A. Cl

B. N2

C. F

D. Ne

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4

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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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 conform both cation and anion?

A. I

B. Cl

C. K

D. F

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4

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

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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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

The element with no definite place in the periodic table is

A. At

B. H

C. N

D. Pt

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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

Which of the following species have minimum size?

A. Br-

B. S-2

C. Ne

D. K+

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4

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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4

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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4

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 has minimum ionisation energy?

A. F

B. Cl

C. Br

D. I

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4

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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4

A metal may have atomic number

A. 85

B. 32

C. 38

D. 2

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4

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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4

Law of octaves was given by

A. Meyer

B. Mendeleev

C. Moseley

D. Newland

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4

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

A. Ru

B. Be

C. Fr

D. Rb

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4

Second electron affinity of the elements is always

A. positive

B. negative

C. zero

D. more than first E.A.

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4

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