8. (ii) Which of the following statement about metal 'M' is true?
(1) It can be cut with knife.
(II) It is present in first group of periodic table
III) It's valency is +2.
(IV) It is a stable element.
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Group 1 elements are highly electropositive in nature as they can easily lose one electron which is present in their valence shell to attain stable configuration and so is electropositive.
(i) Element Y is a non-metal. (1st true)
(ii) The number of valence electrons in Y is 6. ( 2st true)
(iii) Its valency is 2.(3st ans is true)
(iv) The name of the element is Oxygen. (4rd ans false)
l hope it will help u ☺️
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