The atoms of elements belonging to the same group of periodic table have the same :

number of protons

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number of electrons

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number of neutrons

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number of electrons in the outermost shell

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Solution

The correct option is D number of electrons in the outermost shell
Modern periodic table is based on atomic number of elements and elements of a group have same number of electrons in their valence shell.

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Similar questions

Given below are some elements of the modern periodic table:

_{$4^{B e}, 9^{F e}, 14^{S i}, 19^{K}, 20^{C a}$}

(i)Select the element that has one electron in the outermost shell and write its electronic configuration.

(ii)Select two elements that belong to the same group. Give reason for you answer.

(iii) Select two elements that belong to the same period. Which one of the two has bigger atomic size?

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