Choose a likely identity for X, Y, and Z in these structures

lewis-structure

#1

Choose a likely identity for X, Y, and Z in these structures.
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Concepts and reason

  • In chemistry, a Lewis structure represents the number of electrons present around each atom of the molecule as bonding electrons as well as non-bonding electrons.
  • It is also called as Lewis-dot structure that represents the chemical symbol of each element along with lone pair and bond pair of electrons in the molecule.
  • Lewis structure is used to draw a covalently bonded molecule as well as coordination compounds.

Fundamentals

  • A Lewis structure represents the bonding and lone pair of electrons in the molecule.
  • Valence electrons are the electrons present in the outermost shell of an atom.
  • Dots are used to represent the electron position around the atoms and lines or dot pairs are used to represent covalent bonds between atoms.
  • The Lewis structure is based on the concept of the octet rule. So, the shared electrons in each atom have 8 electrons in its outer shell.

Answer:

The total valance electrons present in each element is given below:
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Explanation:
There are various elements present in given multiple choices. The valence electrons for each element are given. Each of the given elements needs particular number of electrons to fulfill the octet configuration.

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The number of bonding electrons is calculated using the following formula:
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The lone pair (non-bonding pair) of electrons is calculated using the following formula:
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Explanation:
The octet electrons are given for each atom and the total sum of electrons should be equal to octet.
The number of bonding electrons is obtained by subtracting the total octet electrons and total valence electrons. The number of lone pair (non-bonding) of electrons is obtained by subtracting the total number of valence electrons with the number of bonding electrons.

The structure of the compound is given below:
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The suitable element for X is "Be"
Check the identity of the element by counting the lone pair and bond-pair electrons.
The bonding pair of electrons is calculated below:
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The lone pair (non-bonding pair) of electrons is calculated below:
image

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The structure of the compound is given below:
image
Check the identity of the element by counting the lone pair and bond-pair electrons.
The bonding pair of electrons is calculated below:
image
The lone pair (non-bonding pair) of electrons is calculated below:
image

image

The structure of the compound is given below:
image
Check the identity of the element by counting the lone pair and bond-pair electrons.
The bonding pair of electrons is calculated below:
image
The lone pair (non-bonding pair) of electrons is calculated below:
image

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