Two or more nuclides having the same neutron number but different number of protons are said to be isotones. For example S 36 , 37 U , 38 A r , 39 K , 40 C a all contain 20 neutrons.

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Properties of Isobars: Isobars of an element have the same number of .

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Important Questions on Structure of The Atom

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Two atoms are said to be isobars if

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

{}_{88}R^{226}

nucleus, there are

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

An isotope of which element is used in the treatment of cancer?

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Radioactive isotope used in the treatment of cancer disease is

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

What are isotones?

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Two elements P and Q have

5

and

7

electrons in their outermost shell respectively. The atomic number of P and Q will be

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Hydrogen contains three types of atoms (

{}_{1}^{1}H

protium,

{}_{1}^{2}H

deuterium,

{}_{1}^{3}H

tritium). These atoms are

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

The half-life of a radioisotope is

4

hours. If the initial mass of the isotope was

200 g

, the mass remaining after

24

hours undecayed

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

What are isotopes, isobars and isotones? Given one example for each.

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Define 'isotope' and 'isobar' and give one example of each.

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Which statement out of the following is true? Isobars have

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Consider the following statements $(X$ and $Y$ stand for two different elements $)$

$I .$ $32 X^{65}$ and ${}_{33}Y^{65}$ are isotopes.

$II .$ $42 X^{86}$ and $42 Y^{85}$ are isotopes.

$III .$ $85 X^{174}$ and $88 Y^{177}$ have the same number of neutrons.

$IV .$ $92 X^{235}$ and ${}_{94}Y^{235}$ are isobars.

The correct statements are:

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Atomic number of an element Z is

16

. Element Z has two isotopes

Z_{1}

and

Z_{2}

with

16

and

18

neutrons, respectively. The average atomic mass of a sample of the element Z is

32.1 μ

. Which one of the following percentage of

Z_{1}

and

Z_{2}

in the sample is correct?

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Isotopes of an element contains

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Which are the isotone, isobar, and isotope nuclei respectivley of

{}_{6}^{12}C

from among

{}_{6}^{14}C, {}_{5}^{12}B, {}_{7}^{13}N

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

What are isobars? Give one example of isobars.

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Which of the following elements you need to remove to form an isotone family ?

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Give a reason for different atomic masses of the isotopes of an element.

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Atomic number of sodium is

11, {Na}^{+}

will have

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Science>Chemistry>Structure of The Atom>Atomic Number and Mass Number

Write brief notes on: isotopes.

Properties of Isobars: Isobars of an element have the same number of .

Important Questions on Structure of The Atom

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