OCR Chemistry Definitions 1.1


Key definitions
Flashcards by 09valentinerhi, updated more than 1 year ago
Created by 09valentinerhi over 9 years ago

Resource summary

Question Answer
Isotopes are atoms of an element with different numbers of neutrons and different masses
Relative Isotopic Mass the mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12
Relative atomic mass is the weighted mean mass of an atom of an element compared with one-tewlfth of the mass of an atom of carbon-12
Amount of substance the quantity whose unit is the mole Chemists use 'amount of substance' as a means of counting atoms
Avogadro Constant the number of atoms per mole
Mole Unit for amount of substance
Molar Mass the mass per mole of a substance
Empirical Formula The simplest whole number ratio of atoms of each element present in a compound
Molecular Formula Th actual number of atoms of each element in a molecule
Salt A salt is produced when the H+ ion of an acid is replaced by a metal ion or NH(4)+
Acid + Carbonate Salt + Water + CO2
Acid + Base Salt + Water
Acid + Alkali Salt + Water
Anhydrous Substance that contains no water molecules
Hydrated A crystalline compound containing water molecules
Water of Crystallisation Water molecules that form an essential part of the crystalline structure of a compound
Show full summary Hide full summary


AS Chemistry - Enthalpy Changes
Sarah H-V
A2 Organic Chemistry - Reactions
OCR Chemistry - Atoms, Bonds and Groups (Definitions)
Maths C4 Trig formulae (OCR MEI)
Zacchaeus Snape
A Level Chemistry Unit 1 - Organic Chemistry
AS Philosophy Exam Questions
Summer Pearce
OCR Chemistry Definitions 2.1
Shapes of molecules - names and pictures
Katie Parkinson
Esters Quiz
Robert Hebbs