Definitions for F321 0.0 / 5 ? ChemistryF321ASOCR Created by: ashleigh510Created on: 05-04-15 16:00 Atom The smallest particle of a chemical element that can exist 1 of 29 Ion an atom or molecule with a net electric charge due to the loss or gain of one or more electrons. 2 of 29 Ionic Bond The electrostatic attraction between oppositely charged ions 3 of 29 Molecule A group of atoms bonded together, forming the smallest fundamental unit of a chemical compound that can take part in a chemical reaction 4 of 29 Compound A thing that is composed of 2 or more separate elements; a mixture 5 of 29 Covalent Bond The sharing of electrons 6 of 29 Allotrope each of two or more different physical forms in which an element can exist. Graphite, charcoal, and diamond are all allotropes of carbon. 7 of 29 Metallic Bond Electrostatic attraction between a sea of negatively charged delocalised electrons and positively charged protons 8 of 29 Electronegativity The ability of an atom to attract the shared pair of electrons in a covalent bond 9 of 29 Van der Waals An intermolecular force that forms a temporary dipole between molecules due to the uneven distribution of electrons 10 of 29 Hydrogen Bond The electrostatic attraction between a H atom and a lone pair of a N,O or F atom. Strong, due to the high difference in electronegativity 11 of 29 Isotope Forms of the same element which contain the same number of protons but a different number of neutrons 12 of 29 Relative Atomic Mass The weighted mean mass of an atom of an element compared with 1 twelfth of the mass of a Carbon-12 atom 13 of 29 Relative Isotopic Mass The mass of an isotope of an element compared with the mass of 1 twelfth of the mass of a Carbon-12 atom 14 of 29 Relative Formula Mass The weighted mean mass of the atoms in a formula unit compared with the mass of 1 twelfth of an atom of Carbon-12 15 of 29 First Ionisation Energy Amount of energy need to remove one electron from each atom in one mole of gaseous atoms to form one mole of gaseous 1+ ions 16 of 29 Mole The base unit in Chemistry of representing an amount of a substance 17 of 29 Empirical formula The simplest whole number ratio of each element in a compound 18 of 29 Molecular Formula Number of atoms of each element in a molecule 19 of 29 Acid A proton donor 20 of 29 Base Proton Acceptor 21 of 29 Alkali Base mixed with water 22 of 29 Salt Compound formed from an acid. Hydrogen ions are replaced by metal ions 23 of 29 Anhydrous no water present 24 of 29 Hydrated water present 25 of 29 Water of Crystallisation Water molecules that form an essential part of the crystalline structure of a compound 26 of 29 Reduction Gain of electrons 27 of 29 Oxidation Loss of electrons 28 of 29 Disproportionation Redox reaction, where the same element is both oxidised and reduced. 29 of 29
Comments
No comments have yet been made