Valency

The ratio of non-metal atoms to the number of atoms of two non-metallic oxides A and B are $0.33$ and $0.25$, respectively. Find the valencies of non-metals present in those non-metallic oxides.

The valency of group $18$ elements is zero.

The valency of potassium ion is:

Explain octet rule with an example.

State Octet rule.

What is the general name of the elements having $8$ electrons in the valence shell of their atoms?

Choose from the following list, as to what matches the descriptions below:

$\left[\left(\mathrm{A}\right) {\mathrm{O}}^{2-} \left(\mathrm{B}\right) {\mathrm{O}}_2 \left(\mathrm{C}\right) {{\mathrm{NH}}_4}^{+} \left(\mathrm{D}\right) {\mathrm{OH}}^{-} \left(\mathrm{E}\right) {\mathrm{H}}_2\mathrm{O} \left(\mathrm{F}\right) {\mathrm{NH}}_4\mathrm{Cl} \left(\mathrm{G}\right) \mathrm{HCl} \left(\mathrm{H}\right){\mathrm{Ca}}^{2+} \left(\mathrm{I}\right) \mathrm{MgO} \left(\mathrm{J}\right) {\mathrm{Ca}}^{2+}\right]$

A cation whose electronic configuration resembles argon.

Enter your answer as $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}, \mathrm{E}, \mathrm{F}, \mathrm{G}, \mathrm{H}, \mathrm{I}$ or $\mathrm{J}$

What is the valency of sulphur?

What is the valency of Fluorine?

Define valency.

An outermost-shell, which had eight electrons was said to possess _____ .

The electrons present in the outermost shell of an atom are known _____ .

The following diagram represents the atomic structure of which element?

An element X has valency equal to 3. What will be its formula with carbonate ions?

An element has an electronic configuration of 2, 8, 7. Its valency is

The element X has 2 valence electrons. It is a _____ .

Three elements A, B and C have atomic number Z-1, Z and Z + 2 respectively. B is a noble gas. The compound between A and C will be :

Which of the following will have equal number of electrons ?

Which of the following is correct electronic configuration of argon ?

If the electronic configuration of elements 'A' and 'B' are $1{\mathrm{s}}^2,2{\mathrm{s}}^2,2{\mathrm{p}}^6,3{\mathrm{s}}^{1}and1{\mathrm{s}}^2,2{\mathrm{s}}^2,2{\mathrm{p}}^6,3{\mathrm{s}}^2,3{\mathrm{p}}^4$ respectively, then the formula of the compound formed by the combination of these elements will be-