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Standard X

Chemistry

Ionization Enthalpy

The elements ...

Question

The elements which are in the left most of the periodic table have properties that have increasing values as atomic number increases include which of the following?
I. Ionization energy (potential)
II. Atomic radius
III. Atomic mass

I only

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III only

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I and II only

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II and III only

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I, II and III

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Solution

The correct options are
A III only
B I only
As the atomic number increases in the same orbital, the ionisation energy and atomic mass increases whereas atomic radius decreases due to increase in nuclear charge.

Hence the correct options are A and B.

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Similar questions

Q. The properties that have increasing values with an increase in atomic number for the elements of 1A are:
I. Ionization energy (potential)
II. Atomic radius
III. Atomic mass

Question 4
Which of the following statement(s) about the Modern Periodic Table are incorrect?

(i) The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number

(ii) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses

(iii) Isotopes are placed in adjoining group (s) in the Periodic Table

(iv)The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number

(a) (i) only
(b) (i), (ii) and (iii)
(c) (i), (ii) and (iv)
(d) (iv) only

Q. Which of the following properties of halogens increases with the increasing atomic number?

(I) Ionization energy,

(II) Ionic radius,

(III) The bond energy of the

X_{2}

molecule,

(IV) Enthalpy of vaporisation.

Parts (a) to (e) refer to changes in the properties of elements on moving from left to right across a period of Periodic Table. For each property, choose the correct answer.

(a) The non-metallic character of the elements :

(i) decreases, (ii) increases,

(iii) remains the same, (iv) depends on the period

(b) The electronegativity :

(i) depends on the number of valence electrons,

(ii) remains the same,

(iii) decreases,

(iv) increases.

(i) goes up and down (ii) decreases

(iii) increases (iv) remains the same

(d) The atomic size :

(i) decreases,

(ii) increases,

(iii) remains the same ,

(iv) sometimes increases and sometimes decreases.

(e) The electron affinity of the elements in groups 1 to 7 :

(i) goes up and then down.

(ii) decreases and then increases,

(iii) increases,

(iv) decreases.

Q. PERIODIC CLASSIFICATION OF ELEMENTS-Why are atomic numbers 27-36 in the fourth period of the Modern Periodic Table, even though only elements with the same number of electronic 'shells' are arranged in the same period(atomic numbers 19-26 have 4 shells and the rest in period 4 have 5 shells)?

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I.	Ionization energy (potential)
II.	Atomic radius
III.	Atomic mass

The elements which are in the left most of the periodic table have properties that have increasing values as atomic number increases include which of the following?I. Ionization energy (potential)II. Atomic radiusIII. Atomic mass

The correct options are A III only B I onlyAs the atomic number increases in the same orbital, the ionisation energy and atomic mass increases whereas atomic radius decreases due to increase in nuclear charge.Hence the correct options are A and B.

The elements which are in the left most of the periodic table have properties that have increasing values as atomic number increases include which of the following?
I. Ionization energy (potential)
II. Atomic radius
III. Atomic mass

The correct options are
A III only
B I only
As the atomic number increases in the same orbital, the ionisation energy and atomic mass increases whereas atomic radius decreases due to increase in nuclear charge.

Hence the correct options are A and B.