Your doctor may need to change the doses of your medications or monitor you carefully for side effects. ... Metformin side effects can also affect other parts of the body. It can leave a metallic taste in the mouth, cause heartburn or headache, flushing of the skin, nail changes or muscle pain. More serious metformin side effects include chest pain or rash. ...
Early String Theory. The first attempt to construct a physical model of an atom was made by William Thomson (later elevated to Lord Kelvin) in 1867. The most striking property of the atom was its permanence.
Answer 1/3. In chemistry the fundamental unit is the atom.. Atoms are themselves made up of smaller components called electrons, protons, and neutrons. These components are made up of even smaller components such as quarks.. Ultimately, the fundamental units of string theory (which are called superstrings) may turn out to be the most fundamental unit of everything.