Which of the following are characteristics of isotopes of an element?
$(i)$ Isotopes of an element have the same atomic masses.
$(i i)$ Isotopes of an element have the same atomic number.
$(i i i)$ Isotopes of an element show the same physical properties.
$(i v)$ Isotopes of an element show the same chemical properties.

(i), (i i i)

and

(i v)

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(i i), (i i i)

and

(i v)

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(i i)

and

(i i i)

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(i i)

and

(i v)

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Solution

The correct option is D $(i i)$ and $(i v)$
Isotopes of an element have same the atomic number but different mass numbers or atomic masses.
Now, atomic number of an element $=$ number of protons $=$ number of electrons
Therefore, the electronic configuration is the same for isotopes and as the chemical properties depend upon the electronic configuration, so the chemical properties is same for the istopes.
Option D is correct.

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Question 16
Which of the following are the characteristics of isotopes of an element?

(i) Isotopes of an element have same atomic masses
(ii) Isotopes of an element have same atomic number
(iii) Isotopes of an element show same physical properties
(iv) Isotopes of an element show same chemical properties

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

Q. Consider the following statements.
(i) All isotopes of an element have the same number of neutrons.
(ii) Only one isotope of an element can be stable and non-radioactive.
(iii) All elements have isotopes.
(iv) All isotopes of Carbon can form chemical compounds with Oxygen-

16

.
The correct option regarding an isotope is

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Statement II: Isotopes have the same number of nucleons.
Statement III: Chemical properties of C-12 and C-14 will be similar.

Which of the given statements is/are correct?

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(i) Isobars of an element have same number of neutrons.
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(iii) Isobars of an element have similar physical properties.
(iv) Isobars of an element have same mass number.

Q. define The isotopes of an element have the same physical properties.

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