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.(11) ^(23)Na and (12)^(24)Mg are...

`._(11) ^(23)Na and _(12)^(24)Mg` are

A

Isotopes

B

Isobars

C

Isodiaphers

D

Isotones

Text Solution

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The correct Answer is:
D
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._(11)^(22)Na contains

The ionic radii of O^(2-),F^(-) , Na^(+) and Mg^(2+) are in the order :

Select the pairs of isotopes and isotones form the following nuclei: ._11Na^(22) , ._12Mg^(24) , ._11Na^(24) , ._10Ne^(23)

A nucleus ""_(11)Na^(24) emits a beta particle to change into Magnesium (Mg). What is the general name ""_(12)^(24)Mg with respect to ""_(11)^(24)Na ?

State the atomic number and mass number of ""_(11)^(23) Na and draw its atomic model.

Average atomic mass of magnesium is 24.31 amu. This magnesium is composed of 79 mole % of .^(24)Mg and remaining 21 mol % of .^(25)Mg and .^(26)Mg . Calculate mole % of .^(26)Mg .

The nucleus .^(23)Ne deacays by beta -emission into the nucleus .^(23)Na . Write down the beta -decay equation and determine the maximum kinetic energy of the electrons emitted. Given, (m(._(11)^(23)Ne) =22.994466 am u and m (._(11)^(23)Na =22.989770 am u . Ignore the mass of antineuttino (bar(v)) .

If Delta=|(a_(11), a_(12), a_(13) ),(a_(21), a_(22), a_(23)),(a_(31), a_(32), a_(33))| and A_(i j) is cofactors of a_(i j) , then value of Delta is given by (A) a_(11)A_(31)+a_(12)A_(32)+a_(13)A_(33) (B) a_(11)A_(11)+a_(12)A_(21)+a_(13)A_(31) (C) a_(21)A_(11)+a_(22)A_(12)+a_(23)A_(13) (D) a_(11)A_(11)+a_(21)A_(21)+a_(31)A_(31)

Na^(23) is more stable isotope of Na . Find out the process by which ._(11)Na^(24) can undergo radioactive decay.

In a periodic table, the average atomic mass of magnesium is given as 24.312 u . The average value is based on their relative natural abundance on earth. The three isotopes and their masses are ._12Mg^(24) (23.98504u) , ._(12)Mg^(25) (24.98584) and ._12Mg^(26) (25.98259 u) . The natural abundance of ._12Mg^(24) is 78.99% by mass. Calculate the abundances of the other two isotopes.