Question

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Answer 1

Answer:

1. c) fluorine 2. a) +1     3.d) 4

Explanation:

1.electronegativity increases across a period (left to right) and also decreases down a groupso the general trend is diagonally across the periodic table from left to right (excluding the noble gases)

fluorine is the most electronegative element and also the most reactive non-metal

2.An ionic bond is formed by the complete transfer of electrons. A bond is formed to attain more stability.

The formation of an octet is the most favorable way to attain stability.

→An element    11 $X^{23}$has 11 electrons in its natural state.

Configuration: $1s^{2} ,2s^{2}, 2p^{6} ,3s^{1}$

In the formation of an ionic bond, it will easily donate 3s electron and gain +1 charge.

The ionic compound formed as X  +$Y^{-}$

Hence, the correct option is A.

3.The valency of Cl is 4.  

In $ACl_{4}$ , 4 Cl atoms are attached so the valency of A should be 4 in order to form a bond with 4 chlorine atoms.