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.
All elements in Group 17 - the halogens. All elements in Group 18 - the noble gases. There is no rigorous definition for the term nonmetal - it covers a general spectrum of behaviour. Common properties considered characteristic of a nonmetal include: poor conductors of heat and electricity when compared to metals.