Definitions 3.0 / 5 based on 1 rating ? ChemistryASAQA Created by: Hannah KentCreated on: 30-03-13 10:57 Define the term Mass Number The total number of protons and neutrons in the nucleus of an atom 1 of 15 Define the term Atomic Number The number of protons in the nucleus of an atom 2 of 15 Define the term the first ionisation energy The amount of energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of gaseous ions 3 of 15 Empirical Formula The simplest ratio of atoms of each element in a compound 4 of 15 Define the term Molecular Formula The actual number of atoms of each element present in a molecule 5 of 15 Define the term Structural Isomer Compounds with the same molecular formula but different structures 6 of 15 Define the term Displayed Formula Shows all the bonds present in a molecule 7 of 15 Define the term Structural Isomer The unique arrangement of atoms in a particular molecule in a simplified form, without showing all the bonds. 8 of 15 Define the term Functional Group An atom of group of atoms which, when present in certain molecules, causes them to have similar chemical properties. 9 of 15 Define the term Structural Isomer Compounds with the same molecular formula but with different structures. 10 of 15 What is Avogadro's constant? 6.022x10^23 particles mol^-1 11 of 15 What is a covalent bond? A shared pair of electrons. 12 of 15 Define the term Chain Isomerism Structural isomers which occur when there are two or more ways of arranging the carbon skeleton of a molecule. 13 of 15 Define the term Electronegativity The power of an atom to attract the shared electrons in a covalent bond. 14 of 15 Define the term Ionic Bond The electrostatic force of attraction between oppositely charged ions. 15 of 15
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