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Standard IX

Physics

Isotopes, Isotones and Isobars

The number of...

Question

The number of neutrons in Sodium and Magnesium nuclides are same and hence we call them as ______________

Isocore

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Isobar

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Isotope

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Isotone

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Solution

The correct option is D
Isotone

When one of two or more atoms having an equal number of neutrons but different atomic number, we call these nuclides as isotones. Sodium and Magnesium has 12 neutrons each but different proton numbers (11 and 12 respectively) or atomic number.

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Similar questions

Nuclei with the same number of protons but a different number of neutrons are called isobars

Nuclei with the same number of neutrons but a different atomic number are called isotopes

Nuclei with the same mass number are called isotones

Q. Observe the following statements regarding isotones :
i)

^{39} K_{19}

and

^{40} C A_{20}

are isotones
ii) Nuclides having different atomic numbers (

z

) and mass number (

A

) but same number of neutrons (n) are called Isotones
iii)

^{19} F_{9}

and

^{23} N A_{11}

are isotones .
The correct answer is

Details of nuclei of three atoms A, B and C are given as- A has 90 protons and 146 neutrons. B has 92 protons and 146 neutrons. C has 90 protons and 148 neutrons. Based on the above data, which of these atoms are isotopes and which are isobars?

Q. An element is represented by

_{Z} X^{A}

, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element.
Mass number (A) = Number of protons (Z) + Number of neutrons.
Isotopes: Atoms having same number of proton
Isobar: Elements having same mass number
Isotones: Elements having same number of neutron (A-Z)

An isotone of

_{40}^{90} Z r

is _________.

Q. Atoms of

_{7} A,_{8} B a n d_{9} C

are such that

_{8} B

is an isobar of

_{7} A

and atom

_{9}^{17} C

is isotone to

_{8} B

. The no. of neutrons in

A

are:

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The number of neutrons in Sodium and Magnesium nuclides are same and hence we call them as ______________

The correct option is D Isotone When one of two or more atoms having an equal number of neutrons but different atomic number, we call these nuclides as isotones. Sodium and Magnesium has 12 neutrons each but different proton numbers (11 and 12 respectively) or atomic number.

The correct option is D
Isotone

When one of two or more atoms having an equal number of neutrons but different atomic number, we call these nuclides as isotones. Sodium and Magnesium has 12 neutrons each but different proton numbers (11 and 12 respectively) or atomic number.