Assertion and reasoning: Features of periods — task. Science State Board, Class 10.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Answer the following questions using the data given below:

1.

Assertion:	Rubidium element present in the fifth period of the periodic table.
Reason:	Because it has atomic number thirty seven.

Assertion:	Francium element present in the seventh period of the periodic table.
Reason:	Because it has atomic number eighty-seven.

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15. Assertion and reasoning: Features of periods