Valency of Elements

The electronic configuration of an element Z is $2, 8, 8$. What type of ion (if any) will be formed by an atom of element Z? Why? 

The electronic configuration of an element Z is $2, 8, 8$. State whether element Z is a metal or a non-metal.

An atom of an element $\mathrm{X}$ may be written as  ${}_4{}^9\mathrm{X}$. Write the symbol of the ion formed by an atom of element $\mathrm{X}$.

$\left(\mathrm{A}\right) {\mathrm{X}}^{2+} \left(\mathrm{B}\right) {\mathrm{X}}^{+} \left(\mathrm{C}\right) {\mathrm{X}}^{2-}$

Enter your answer as $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$.

An atom of element E contains $3$ protons, $3$ electrons and $4$ neutrons : What could element E be? Name it. 

An atom of element $\mathrm{E}$ contains $3$ protons, $3$ electrons and $4$ neutrons:
Write the symbol of the ion formed by an atom of element $\mathrm{E}$.

$\left(\mathrm{A}\right) \mathrm{E} \left(\mathrm{B}\right) {\mathrm{E}}^{+} \left(\mathrm{C}\right) {\mathrm{E}}^{-}$

Enter your answer as $\mathrm{A}, \mathrm{B}$ or $\mathrm{C}$.

An atom of element E contains $3$ protons, $3$ electrons and $4$ neutrons : 

What type of ion, cation or anion, will be formed by an atom of element E? Why?

An atom of element E contains $3$ protons, $3$ electrons and $4$ neutrons : 

State whether element E is a metal or non-metal. Why? 

The isotopes of an element contain:

The atomic number of an element X is $8$ and that of element Y is $4$. Both these elements can exhibit a valency of :

For an element, Z = 9. The valency of this element will be:

Elements having valency 'one' are:

What is the relation between the valency of an element and the number of valence electrons in its atoms? Explain with examples.

Define valency of an element. What valency will be shown by an element having atomic number 14?

An element has $\mathrm{Z} = 7$. What is the valency of the element? Also name the element.

What valencies will be shown by the elements $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}$ and $\mathrm{E}$ having atomic number $2, 4, 8, 10$ and $13$ respectively.

The atomic number of an element $\mathrm{X}$ is $16$. What will be the valency of $\mathrm{X}$?

Write the electronic configuration of the element with atomic number $17$. Indicate the valency of the element.

The valency of nitrogen in ${\mathrm{N}}_2$ molecule is _____.

Which noble gas has less than $8$electrons in the valence shell of its atom? What is this number?

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