Some common mouth problems include. 1  Cold sores - painful sores on the lips and around the mouth, caused by a virus. 2  Canker sores - painful sores in the mouth, caused by bacteria or viruses. 3  Thrush - a yeast infection that causes white patches in your mouth.
-Explain why energy input is necessary to extract a metal from its ore In order to break the chemical bonds in the compounds, energy such as heat or electricity is required to break these bonds and extract the metal. -Identify why there are more metals available for people to use then there were 200 years ago.etal + Oxygen Metal Oxide Metals with a low reactivity such as gold and silver are used in jewellery because of their shiny lustre and the fact that they do not tarnish easily. with a particular emphasis on current developments in the use of metals. This is because the metal tends to want to keep its electrons more.
Making the world better, one answer at a time. Many ores contain metal oxides. Metal oxides are more stable than metals. Energy is required to break the metal oxygen bond in these metal oxides to release the metal in its elemental form.n refining Iron from its ore you put the iron ore in an oxygen deprived environment. This is done by surrounding the ore with coal so that the Carbon in the coal 'robs' the oxygen off of the Iron to foster its own oxidation. This gives the iron not chance to re-oxidize.