Helium.com | View Art Vandelay's articles http://www.helium.com/users/25234.xml View Art Vandelay's articles en-us Copyright Helium.com Wed, 11 Nov 2009 07:06:34 GMT Wed, 11 Nov 2009 07:06:34 GMT Bodily excretions can say a lot about the body's health. The color of stool is sometimes changed by certain kinds of food, but it can also be alter... http://www.helium.com/items/1646700-stool-color-when-to-seek-medical-advice Wed, 11 Nov 2009 07:06:34 Zinc is a metallic element which has been used by humans for millennia. Zinc's chemical symbol is Zn and its atomic number is 30. It belongs to the... http://www.helium.com/items/1644383-the-chemical-properties-of-zinc Mon, 09 Nov 2009 06:58:47 Swollen lips can be indicative of a number of possible allergic reactions. The most frequent allergies to cause swollen lips are food allergies, us... http://www.helium.com/items/1639133-allergic-reactions-swollen-lips Wed, 04 Nov 2009 07:46:06 Copper is a reddish brown element in the transition metals family of the periodic table. Copper is in the fourth period and eleventh group of the p... http://www.helium.com/items/1639083-the-chemical-properties-of-copper Wed, 04 Nov 2009 05:52:49 In chemistry, there are two types of reactions involving a redistribution of energy: exothermic and endothermic reactions. The concept of exothermi... http://www.helium.com/items/1637256-the-difference-between-exothermic-and-endothermic-chemical-reactions Mon, 02 Nov 2009 18:02:43