All of the halogens . exist under ambient conditions as diatomic gases tend to form positive ions of several different charges tend to form negative ions of several different charges exhibit metallic character form salts with alkali metals with the formula MX

Halogens.

Explanation:

All of the halogens form salts with alkali metals with the formula MX.

Halogens are the members of group 17 in the periodic table. They have seven electron in their valence shell and tend to form negative ion with minus one charge. They get there name  because of their property to form salts. Halogens are very reactive and form salts with the metals.

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.

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