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.
people think that j.j. Thompson discovered the electron in 1897, but nikola tesla has records of his discovery of negatively charged particles being responsible for electric c â¦ urrents years before Thomson discovered it. Atoms are able to bond together because of what is known as the octet rule, which is followed by mâ¦. 2  Understanding Electrons An electron is a subatomic particle that revolves around the protons and neutrons in an atom's central nucleus.