If K and L shells of an atom are full, then what would be total number of electrons in atom ?

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4. STRUCTURE OF THE ATOM

easy

If $K$ and $L$ shells of an atom are full, then what would be the total number of electrons in the atom ?

$8$

$10$

$6$

$2$

Solution

The maximum capacity of $K$ shell is $2$ electrons and $L$ shell can accommodate maximum $8 $ electrons in it. Therefore, there will be ten electrons in the atom.

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.

medium

Number of valence electrons in $Cl^-$ ion are :

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Rutherford’s alpha-particle scattering experiment was responsible for the discovery of

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What are canal rays ?

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Compare the properties of electrons, protons and neutrons.

medium

If $K$ and $L$ shells of an atom are full, then what would be the total number of electrons in the atom ?

Solution

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