Describe the pattern of the lewis dot structure of the first 18 elements

Explanation: Lewis dot structures are the structures which represent the valence electrons of an atom. The dots in the structure are considered as the valence electrons.

First 18 elements of the periodic table are Hydrogen(H), Helium (He), Lithium (Li), Beryllium (Be), Boron (B), Carbon (C), Nitrogen (N), Oxygen (O), Fluorine (F), Neon(Ne), Sodium (Na), Magnesium (Mg), Aluminium (Al), Silicon (Si), Phosphorous (P), Sulfur (S), Chlorine (Cl) and Argon(Ar).

The valence electrons are the electrons which are present in the outermost shell of an atom. The electronic configuration of the elements are:

Hydrogen (H) = [tex]1s^1[/tex] ; Valence electrons = 1

Helium (He) = [tex]1s^2[/tex] ; Valence electrons = 2

Lithium (Li) = [tex]1s^22s^1[/tex] ; Valence electrons = 1

Beryllium (Be) = [tex]1s^22s^2[/tex] ; Valence electrons = 2

Boron (B) = [tex]1s^22s^22p^1[/tex] ; Valence electrons = 3

Carbon (C) = [tex]1s^22s^22p^2[/tex] ; Valence electrons = 4

Nitrogen (N) = [tex]1s^22s^22p^3[/tex] ; Valence electrons = 5

Oxygen (O) = [tex]1s^22s^22p^4[/tex] ; Valence electrons = 6

Fluorine (F) = [tex]1s^22s^22p^5[/tex] ; Valence electrons = 7

Neon (Ne) = [tex]1s^22s^22p^6[/tex] ; Valence electrons = 8

Sodium (Na) = [tex]1s^22s^22p^63s^1[/tex] ; Valence electrons = 1

Magnesium (Mg) = [tex]1s^22s^22p^63s^2[/tex] ; Valence electrons = 2

Aluminium (Al) = [tex]1s^22s^22p^63s^23p^1[/tex] ; Valence electrons = 3

Silicon (Si) = [tex]1s^22s^22p^63s^23p^2[/tex] ; Valence electrons = 4

Phosphorous (P) = [tex]1s^22s^22p^63s^23p^3[/tex] ; Valence electrons = 5

Sulfur (S) = [tex]1s^22s^22p^63s^23p^4[/tex] ; Valence electrons = 6

Chlorine(Cl) = [tex]1s^22s^22p^63s^23p^5[/tex] ; Valence electrons = 7

Argon (Ar) = [tex]1s^22s^22p^63s^23p^6[/tex] ; Valence electrons = 8

Elements hydrogen and helium belong to period 1 of the period table, so the lewis dot structures will have maximum of 2 electrons

Elements from lithium to neon belong to period 2 and the lewis dot structures will have maximum of 8 electrons.

Elements from sodium and argon belong to the period 3 of the periodic table, and will have maximum of 8 electrons in their lewis dot structures.

Lewis dot structures are attached below.

pstnonsonjoku pstnonsonjoku · Answer 2 · 2021-10-28T06:35:17+02:00

Across the period, the number of valence electrons increases from one to eight.

The dot electron structure of elements shows the number of valence electrons on the valence shell of atoms of elements. The valence electrons are represented as dots.

We can see that from left to right in each period, the number of valence electrons increases for the first eighteen elements. In each period. The maximum number of valence electrons possible for atoms of elements is eight. The noble gases often have the maximum number of valence electrons in a period.

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