Chemistry keywords - Additional Science 0.0 / 5 ? ChemistryAdditional ScienceGCSEEdexcel Created by: NattelyCreated on: 19-04-14 09:08 Actual Yield The actual amount of product obtained from a chemical reaction. This is also known as the yield of the reaction. 1 of 9 Alkali metal An element in group 1 of the periodic table. 2 of 9 Anion Negatively charged ion. 3 of 9 Aqueous solution Mixture formed when a substance is dissolved in water. 4 of 9 Atom The smallest neutral part of an element that can take part in chemical reactions. 5 of 9 Atomic number The number of protons in the nucleus of an atom. Also known as the proton number. 6 of 9 Balanced equation Description of a reaction using the symbols, so that the number of 'units' of each element to the left of the arrow is the same as those to the right. 7 of 9 Barium meal A drink containing barium sulfate. It is swallowed so that the parts of the digestive system show up on X-ray photographs. 8 of 9 Becquerel (Bq) The units for the activity of a radioactive object. One Becquerel is one radioactive decay per second. 9 of 9
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