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Ans6) Element ‘X’ is Aluminium.It’s group is 13 and period 3.
Ans7) Atomic number is 17. Chloride ions are formed by it. Chlorine is non-metal element.
Ans8) (a) ATOMIC SIZE :- The distance between centre of nucleus and valence shell.
(b) VALENCY :- Valency is the combining capacity of an element.
(c) ELECTRONEGATIVITY :- It is the tendency of a non-metal to gain electrons and get converted to negativity charged anion.
Ans7) Atomic number is 17. Chloride ions are formed by it. Chlorine is non-metal element.
Ans8) (a) ATOMIC SIZE :- The distance between centre of nucleus and valence shell.
(b) VALENCY :- Valency is the combining capacity of an element.
(c) ELECTRONEGATIVITY :- It is the tendency of a non-metal to gain electrons and get converted to negativity charged anion.
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