(D) The element $M$ has $3$ valence electrons,so its valency is $3$ and it forms $M^{3+}$ ions.The element $A$ has $7$ valence electrons,so its valenc

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(D) The element $M$ has $3$ valence electrons,so its valency is $3$ and it forms $M^{3+}$ ions.The element $A$ has $7$ valence electrons,so its valency is $1$ and it forms $A^{-}$ ions.To form a neutral compound,one $M^{3+}$ ion combines with three $A^{-}$ ions.Therefore,the chemical formula of the compound is $MA_3$.

Class 11 Chemistry Classification of Elements and Periodicity in Properties Valency and oxidation state

Easy

If the electronic configuration of $M = 2, 8, 3$ and that of $A = 2, 8, 7$,the formula of the compound is

A
$M_2A_3$
B
$MA_2$
C
$M_2A$
D
$MA_3$

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Classification of Elements and Periodicity in Properties

Subtopic

Valency and oxidation state

Write the name of $Cr_2O_3$ according to stock notation.

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The lowest oxidation number of an atom $B$ in a compound $A_2 B$ is $-2$. The number of electrons in its valence shell is:

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The electronic configuration of a metal $M$ is $1s^2 2s^2 2p^6 3s^1$. What will be the formula of its oxide?

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Which of the oxidation state$(s)$ is/are shown by the element sulphur?

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Which of the properties remains unchanged on descending a group in the periodic table?

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If the electronic configuration of $M = 2, 8, 3$ and that of $A = 2, 8, 7$,the formula of the compound is

Similar Questions

Write the name of $Cr_2O_3$ according to stock notation.

The lowest oxidation number of an atom $B$ in a compound $A_2 B$ is $-2$. The number of electrons in its valence shell is:

The electronic configuration of a metal $M$ is $1s^2 2s^2 2p^6 3s^1$. What will be the formula of its oxide?

Which of the oxidation state$(s)$ is/are shown by the element sulphur?

Which of the properties remains unchanged on descending a group in the periodic table?

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