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11(Na) 1s^2 2s^2 2p^6 3s^1. i) It is a s...

`11_(Na)` `1s^2` `2s^2` `2p^6` `3s^1`. i) It is a s- block element, ii) It's valency is '1', iii) It can easily form a positive ion

A

i, ii are true

B

ii, iii are true

C

i, iii are true

D

All are true

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  1. Element →H to F to Cl →Co & Ni to Br to Pd to I → Pt & Ir No 1 to 8 → ...

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  2. Differentiating electrons of some elements are as given, Na = 3s^1, Al...

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  12. F(4.0), Cl(3.0), Li(1.0), Be (1.47) Electronegativity values are give...

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  13. B, Si, Ge,  As are:

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