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Nucleus Common Terms

Isotone of an...

Question

Isotone of an element has -

A

Same number of electrons

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B

Same number of protons

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C

Same number of neutrons

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D

Same number of neutrons & protons

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Solution

The correct option is C Same number of neutrons
Two nuclides are isotones if they have the very same neutron number N, but different proton number Z.
For example, boron-12 and carbon-13 nuclei both contain 7 neutrons, and so are isotopes.

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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

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

Q. The isotopes of an element contain :

(a) same number of neutrons but different number of protons

(b) same number of neutrons but different number of electrons

(c) different number of protons as well as different number of neutrons

(d) different number of neutrons but same number of protons

Q. Which of the following elements has the same number of protons, electrons and neutrons?

Q. An element X has number of protons = 4. What will be its mass number if it has 3 neutrons?

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