Covalent Structures

An element $\mathrm{L}$ has $9$ protons and its valency is $1$. Another element $\mathrm{M}$ has valency $3 \mathrm{and} 5$. What is the difference in the number of electrons in $\mathrm{L} \mathrm{and} \mathrm{M}$ ?

What will be the probable chemical formula if the valence shell of element $\mathrm{A}$ contain three electrons, while the valence shell of element $\mathrm{B}$ contain six electrons are combined?

In ${\mathrm{OF}}_2$ molecule, the number of bond pairs and lone pairs of electrons are $2 \mathrm{and} 8$.

Lewis symbols are used to depict _____ in simple molecules.

The number of dots around the symbol represents the number of _____ electrons.

What do you mean by valence electrons?

The electrons present in the outermost shell of an atom are called valence electrons.

In ${\mathrm{OF}}_2$ molecule, the number of bond pairs and lone pairs of electrons are:

What is the covalency of chlorine in its second excited state?

Which one is electron deficient compound?

Which of the following is electron deficient molecule?

An atom $X$ has three valence electrons and atom $Y$ has six valence electrons. The compound formed between them will have the formula

Number of electrons in the valence orbit of nitrogen in an ammonia molecule is:

An atom of an element $\mathrm{A}$ has $3$ electrons in its outermost orbit and that of $\mathrm{B}$ has $6$ electrons in its outermost orbit. The formula of the compound between these two will be

Which of these molecules have non-bonding electron pairs on the central atom ?

I. ${\mathrm{SF}}_4$II. ${\mathrm{ICl}}_3$ III. ${\mathrm{SO}}_2$

The number of electron dots in Lewis structure indicates:

In which of the following the central atom has maximum number of lone pair of electrons ?

In which of the following, the central atom has the maximum number of lone pair of electrons ?