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Isotopes and Isotones

Isotopes are ...

Question

Isotopes are the atoms of element having the atomic number but mass number.

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Solution

Isotopes are the atoms of same element having the same atomic number but different mass number

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Atom A has a mass number 209 and atomic number 82.

Atom B has a mass number 209 and atomic number 83.

(i) How many protons atom A has ?

(ii) How many protons atom B has ?

(iii) Are atoms A and B isotopes of the same element ?

Q. Isotopes of an element have the same atomic number but a different ________.

Q. Assertion :The mass spectrometer is used for determination of the atomic mass of isotopes.
Reason: Isotopes are the atoms of the same element having a same atomic number but different mass numbers.

Q. The isotopes of an element have mass numbers A, A + 1, A + 2. The ratio of abundance of these isotopes is

3 : 2 : 4

. Calculate the average atomic mass of the element.:

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.
Isoelectronic: Species/ elements having same number of electron
Isodiaphers: Elements having same value of

| (A - 2 Z) |

Isotopes: Atoms having same number of proton

Which of the following is a pair of isodiaphers?

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