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Isotopes and Isotones

Elements and ...

Question

Elements and their isotopes have different:

A

mass numbers

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B

number of protons

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C

number of electrons

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D

chemical properties

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Solution

The correct option is C mass numbers
The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Different isotopes of the same element have different masses.

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Similar questions

Q. 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.

Q. Statement 1:

_{6}^{13} C

_{6}^{14} C

are isotopes of the element carbon.
Statement 2: Isotopes of an element have the same number of protons in the nucleus but have a different number of neutrons.

_{17}^{35} C l

_{17}^{37} C l

have the same chemical properties. Reason: Isotopes have the same number of protons and electrons and the same chemical reactions.

Q. Assertion :All the isotopes of a given element show same chemical behaviour. Reason: Isotopes have different number of neutrons present in the nucleus.

Both isotopes and isobars are different in their chemical properties.

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