Write electronic configuration of any one pair of isotopes and isobars.

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4. STRUCTURE OF THE ATOM

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Write the electronic configuration of any one pair of isotopes and isobars.

Option A

Option B

Option C

Option D

Solution

${ }^{12} C _{6}$ and ${ }^{14} C _{6}$ are isotopes, have the same electronic configuration as $(2,\,4)$ $^{22} Ne _{10}$ and ${ }^{22} Ne _{11}$ are isobars. They have different electronic

configuration as given below :

${ }^{22} Ne _{10}-2,\,8$

${ }^{22} Ne _{11}-2,\,8,\,1$

Standard 9

Science

For the following statements, write $T$ for True and $F$ for False.

$(a)$ J.J. Thomson proposed that the nucleus of an atom contains only nucleons.

$(b)$ A neutron is formed by an electron and a proton combining together. Therefore, it is neutral.

$(c)$ The mass of an electron is about $\frac {1}{ 2000}$ times that of proton.

$(d)$ An isotope of iodine is used for making tincture iodine, which is used as a medicine.

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If bromine atom is available in the form of, say, two isotopes $_{35}^{79}Br$ $(49.7 \%)$ and $_{35}^{81}Br$ $(50.3 \%),$ calculate the average atomic mass of bromine atom.

medium

Compare all the proposed models of an atom given in this chapter.

medium

What are the limitations of Rutherford's model of the atom ?

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If number of electrons in an atom is $8$ and number of protons is also $8$, then $(i)$ what is the atomic number of the atom ? and $(ii)$ what is the charge on the atom ?

medium

Write the electronic configuration of any one pair of isotopes and isobars.

Solution

Similar Questions

If bromine atom is available in the form of, say, two isotopes $_{35}^{79}Br$ $(49.7 \%)$ and $_{35}^{81}Br$ $(50.3 \%),$ calculate the average atomic mass of bromine atom.

Compare all the proposed models of an atom given in this chapter.

What are the limitations of Rutherford's model of the atom ?

If number of electrons in an atom is $8$ and number of protons is also $8$, then $(i)$ what is the atomic number of the atom ? and $(ii)$ what is the charge on the atom ?

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