Chemistry, 16.11.2019 01:31 Nakieapowell1276

Elements are organized into groups / families according to their physical and chemical properties. identify the elements that’s belong to each family based on there number of valence electrons. write the names and symbol for each element

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The names and symbols of elements that are divided into groups or families based on the chemical and physical properties are as follows.

Explanation:

The arrangement of electrons in an atom is referred to as electronic configuration and valence electrons are electron number & structure present in last shell of atoms. There are 18 groups/families and 7 periods in periodic table. The elements which belong to each family based on their number of valence electrons as follows and here n is no of shell:

Alkali metal (1 valence electron / ${ns^{1}}$ ): Name of the element: Lithium and Symbol: (Li) and Name of the element: Sodium and Symbol: (Na)

Alkaline Earth Metal (2 valence electron / ${ns^{2}}$ ): Name of the element: Beryllium and Symbol: (Be) & Name of the element: Magnesium and Symbol: (Mg)

Boron Family (3 valence electron / ${ns^{2}}{np^{1}}$ ): Name of the element: Boron and Symbol: (B) & Name of the element: Aluminum and Symbol: (Al)

Carbon Family (4 valence electron / ${ns^{2}}{np^{2}}$ ): Name of the element: Carbon and Symbol: (C) & Name of the element: Silicon and Symbol: (Si)

Nitrogen Family (5 valence electron / ${ns^{2}}{np^{3}}$ ): Name of the element: Nitrogen and Symbol: (N) & Name of the element: Phosphorus and Symbol: (P)

Oxygen Family (6 valence electron / ${ns^{2}}{np^{4}}$ ): Name of the element: Oxygen and Symbol: (O) & Name of the element: Sulfur and Symbol: (S)

Halogens Family (7 valence electron / ${ns^{2}}{np^{5}}$ ): Name of the element: Fluorine and Symbol: (F) & Name of the element: Chlorine and Symbol: (Cl)

Nobel Gases (8 valence electron / ${ns^{2}}or{ns^{2}}{np^{6}}$ / Octet complete or complete outermost shell): Name of the element: Helium and Symbol: (He), Name of the element: Neon and Symbol: (Ne) and Name of the element: Argon and Symbol: (Ar)

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Elements are organized into groups / families according to their physical and chemical properties. i...

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