Stomach acid buildup can occur for many reasons, including heredity, diet and your body's natural acidity, and excessive stomach acid can occur in both isolated and chronic cases.
The alkali metals, halogens and noble gases are three important groups in the periodic table. The alkali metals are soft, reactive metals. They react vigorously with water and become more reactive as you go down the group.The halogens are reactive non-metals.They become darker as you go down the group.Their reactivity decreases as you go down the group and their boiling points increase. A more reactive halogen will displace a less reactive halogen from solutions of its salts.he halogens are reactive non-metals. They become darker as you go down the group. Their reactivity decreases as you go down the group and their boiling points increase. A more reactive halogen will displace a less reactive halogen from solutions of its salts.
Rare Earth Elements The halogens are five non-metallic elements found in group 17 of the periodic table. The term halogen means salt-former and compounds containing halogens are called salts. All halogens have 7 electrons in their outer shells, giving them an oxidation number of -1. The halogens exist, at room temperature, in all three states of matter: Solid- Iodine, Astatine; Liquid- Bromine; Gas- Fluorine, Chlorine; The Halogens are: Fluorine