Question

An element forms an oxide A2 O5. What is the valency of the element A. What will be the formula of the chloride of the element Please Help Me

Answer 1

Answer :-

→ Valency of element A = +5

→ Formula of chloride of 'A' = ACl₅

Explanation :-

Formula of a compound is given A₂O₅ .

We know that, while writing formula of a compound, valencies of the cation and the anion are criss crossed .

Since the valency of Oxygen is -2 (anion), so valency of the element 'A' will be = +5 .

______________________________

Now, we need to write the formula of Chloride of element A . Here, A is cation and chlorine is anion .

• Valency of A = +5

• Valency of Chlorine (Cl) = -1

The required formula by crossing valencies will be :-

= A₁Cl₅

= ACl₅

Some Extra Information :-

The valencies of some other important elements are :-

→ Hydrogen (H) = +1

→ Carbon (C) = 4

→ Sodium (Na) = +1

→ Aluminium (Al) = +3

Answer 2

Answer:

$\sf\tt\large{\green {\underline {\underline{⚘\;Question:}}}}$

• An element forms an oxide A2O5 .

1. What will be the valency of the element A .
2. What will be the formula of chloride of the element.

$\sf\tt\large{\green {\underline {\underline{⚘\;Answers:}}}}$

1. Valency of element of a chloride of A =5.
2. The formula for chloride of the element will be ACl5.

$\sf\tt\large{\red {\underline {\underline{⚘\;Solution:}}}}$

$\sf\tt\large{\red {\underline {\underline{⚘\;Question 1:}}}}$

• An element forms an oxide A2O5.

1. what will be the element of chloride A.

$\sf\tt\large{\red {\underline {\underline{⚘\;Answer:}}}}$

• Let us first define what is valency?

• It is defined as the combining power of the element Specifically as measured by total number of hydrogen atoms it can easily displace or combine with.

Consider ,

• The valency of element A be y,
• Then,

• 2y+5 (-2)=0

• Therefore, y=element of A=5.

$\sf\tt\large{\red {\underline {\underline{⚘\;Question 2:}}}}$

• An element forms an oxide A2O5.

1. What will be the formula of chloride of the element .

$\sf\tt\large{\red {\underline {\underline{⚘\;Answer:}}}}$

• We know that,

1. The valency of an atom equals to the number of electrons in the outer shell.If that number may four or less than 4.

• Since, here

• Valency of element A is 5 and valency of chlorine is -1

• Therefore, The formula of chloride of the element is (ACl 5) .

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