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Standard VII

Chemistry

Chemical Formulae

Two element X...

Question

Two element X and Y have following electronic configuration
$X 1 s^{2}; 2 s^{2}, 2 p^{6}; 3 s^{2}, 3 p^{6}; 4 s^{2}$
$Y 1 s^{2}; 2 s^{2}, 2 p^{6}; 3 s^{2}, 3 p^{5}$
The expected compound formed by combination of X and Y will be expressed as :

X Y_{2}

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X_{5} Y_{2}

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X_{2} Y_{5}

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X Y_{5}

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Solution

The correct option is A $X Y_{2}$
Valency of $x = 2 \Rightarrow x^{+ 2}$
Valency of $y = 1 \Rightarrow y^{+ 2}$
$∴ x^{+ 2} y^{- 1}$
$x y_{2}$

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Similar questions

Q. Two elements X and Y have the following electronic configurations

X = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

and

Y = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}

. The formula of the compound formed by the combination of X and Y is :

Q. Two elements

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The compound formed by the combination of

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Q. Two elements

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X =

1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{3}, 3 p^{6}, 4 s^{2}

and

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1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{5}

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Q. Outermost shells of two elements X and Y have one and six electrons respectively. If they combine, what will be expected formula of the compound?

An element X of atomic number 12 combines with an element Y of atomic number 17 to form a compound $X Y_{2}$ . State the nature of the chemical bond in $X Y_{2}$ and show how the electron configuration of X and Y change in the formation of this compound.

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Two element X and Y have following electronic configurationX1s2;2s2,2p6;3s2,3p6;4s2Y1s2;2s2,2p6;3s2,3p5The expected compound formed by combination of X and Y will be expressed as :

The correct option is A XY2Valency of x=2⇒x+2Valency of y=1⇒y+2∴x+2y−1xy2

Two element X and Y have following electronic configuration
$X 1 s^{2}; 2 s^{2}, 2 p^{6}; 3 s^{2}, 3 p^{6}; 4 s^{2}$
$Y 1 s^{2}; 2 s^{2}, 2 p^{6}; 3 s^{2}, 3 p^{5}$
The expected compound formed by combination of X and Y will be expressed as :

The correct option is A $X Y_{2}$
Valency of $x = 2 \Rightarrow x^{+ 2}$
Valency of $y = 1 \Rightarrow y^{+ 2}$
$∴ x^{+ 2} y^{- 1}$
$x y_{2}$