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Four groups in the periodic table are given special names. These are:

π’œπ“π“€π’Άπ“π’Ύ π“‚π‘’π“‰π’Άπ“π“ˆΒ 

-Group 1 on the periodic table
β˜€οΈElements:
Lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
β˜€οΈProperties:
They are very reactive metals forming strongly alkaline hydroxides. They readily lose their outermost electron to form cations with charge +1.

π’œπ“π“€π’Άπ“π’Ύπ“ƒπ‘’ 𝑒𝒢𝓇𝓉𝒽 π“‚π‘’π“‰π’Άπ“π“ˆΒ 

-Group 2 on the periodic table
β˜€οΈElements:
Beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
β˜€οΈProperties:
They are somewhat reactive at STP. They readily lose their two outermost electrons to form cations with charge +2.

π»π’Άπ“π‘œπ‘”π‘’π“ƒπ“ˆ

-Group 17 on the periodic table
β˜€οΈElements:
Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
β˜€οΈProperties:
The term "halogen" means "salt-former" and compounds containing halogens are called "salts". All halogens have 7 electrons in their outer shells, causing them to gain one electron in chemical reactions to form anions with a charge of -1.

π’©π‘œπ’·π“π‘’ π‘”π’Άπ“ˆπ‘’π“ˆ

-Group 18 on the periodic table
β˜€οΈElements:
Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
β˜€οΈProperties:
They have a notable lack of reactivity due to their full outer orbital of 8 valence electrons. Helium, neon, and argon do not combine with any other elements to form compounds, while krypton, xenon, and radon may rarely form compounds with the most reactive of elements, fluorine.

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