Inorganic Chemistry by Chrispin Kowenje - HTML preview

1. fluorine, a poisonous pale yellow gas

2. chlorine, a poisonous greenish gas, has an irritating odor

3. bromine, a toxic and caustic red-brown volatile liquid at room temperature

4. iodine, a shiny dark grey crystalline solid at room temperature but which

easily sublimes to form a violet vapour on heating

N.B. All the isotopes of astatine are radioactive, and so this element will not be

considered any further here.

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Chemical Properties

1. All halogens have seven valence electrons which form ions with a negative

(-1) charge

2. Fluorine is the most reactive of all the nonmetals