Lewis Symbols (or) Lewis Dot Structures

Represent the following atoms using Lewis notation:

Lithium

Represent the following atoms using Lewis notation:

Calcium

Represent the following atoms using Lewis notation:

Beryllium

Represent the molecule ${\mathrm{H}}_2\mathrm{O}$ by using Lewis notation.

Draw a simple diagram to show how electrons are arranged in the following covalent molecule.

Chlorine ${\mathrm{Cl}}_2$

Draw a simple diagram to show how electrons are arranged in the following covalent molecule.

Water $\left({\mathrm{H}}_2\mathrm{O}\right)$

Draw a simple diagram to show how electrons are arranged in the following molecule:

Calcium oxide

A chemical compound has the following Lewis notation:

Suggest a name for the elements $\mathrm{X}$ and $\mathrm{Y}$.

A chemical compound has the following Lewis notation:

How many covalent bonds are there in the molecule?

How Lewis dot structure helps in understanding bond formation between atoms?

A chemical compound has the following Lewis notation:

What is the valency of element $\mathrm{X}$?

Two chemical reactions are described below.
(i) Nitrogen and hydrogen react to form ammonia $\left({\mathrm{NH}}_3\right)$.
(ii) Carbon and hydrogen bond to form a molecule of methane $\left({\mathrm{CH}}_4\right)$.
For each reaction give; the Lewis structure of the product that is formed.

In bromine gas $\left({\mathrm{Br}}_2\right)$, calcium chloride $\left({\mathrm{CaCl}}_2\right)$ and carbon dioxide $\left({\mathrm{CO}}_2\right)$ which contain a double bond?

Represent the molecule of carbon dioxide $\left({\mathrm{CO}}_2\right)$ using Lewis notations. 

A chemical compound has the following Lewis notation:

What is the valency of element $\mathrm{Y}$?

Represent the molecule of calcium chloride $\left({\mathrm{CaCl}}_2\right)$ using Lewis notations. 

Represent the molecule of bromine gas$\left({\mathrm{Br}}_2\right)$ using Lewis notation.

A chemical compound has the following Lewis notation:

How many valence electrons does element $\mathrm{Y}$ have?