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The Group I elements show similar properties because of - 

Option: 1

The same number of protons and electrons

 


Option: 2

More neutrons than protons

 


Option: 3

Two electrons in the first shell


Option: 4

One electron in the outermost shell


Answers (1)

Electronic configuration of Group I elements is\mathrm{[Noble\; Gas]\; ns^{1}}.

Due to this electronic configuration, they readily lose electron to give unipositive M+ ions and attain noble gas configuration. They are most electropositive metals. Hence, never found in free state in nature.

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Ramraj Saini

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