What is crystallisation - Study guides, Class notes & Summaries

what are physical differences that elements or compounds may have solubility mp/bp particle size or mass what is the difference between a miscible liquid and an immiscible liquid -miscible mix well with another to form a homogenous solution immiscible liquids cannot mix to give single phase. eg. water and oil as oil floats on top of water What is decantation? -process to seperate mixtures by removing a liquid layer that is free of a solid or another liquid can be used to seperate mixtu...

AQA GCSE CHEMISTRY 8462/1F Paper 1 Foundation Tier Question Paper + Mark scheme [MERGED] June 2022 *JunF01* IB/M/Jun22/E10 8462/1F For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL Time allowed: 1 hour 45 minutes Materials For this paper you must have: • a ruler • a scientific calculator • the periodic table (enclosed). Instructions • Use black ink or black ball-point pen. • Pencil should only be used for drawing. • Fill in the boxes at ...

OCR Chemistry A-Level - Modules 1-4 with complete solution what is water of crystallisation? water molecules that make up part of the crystal structure of a solid define relative isotopic mass the ass of an atom of an isotope of an element relative to one twelfth the mass of an atom of C-12 why is relative atomic mass written as a decimal? it is a weighted average mass define molecular formula the actual number of atoms of each element in a compound define what an orbital is a region...

AQA GCSE Chemistry Paper 1 What is an *atom*? - ANS smallest part of an element What is an *element*? - ANS a substance that contains only one type of atom What are *chemical symbols*? - ANS - the letter or pair of letters that represents an element. - first letter is always capitalized What are *compounds*? - ANS substances in which atoms of two or more elements, which are chemically combined What is a *chemical formula*? - ANS a combination of symbols that shows t...

what is water of crystallisation? water molecules that make up part of the crystal structure of a solid define relative isotopic mass the ass of an atom of an isotope of an element relative to one twelfth the mass of an atom of C-12 00:03 01:39 why is relative atomic mass written as a decimal? it is a weighted average mass define molecular formula the actual number of atoms of each element in a compound define what an orbital is a region within an atom ...

OCR Chemistry A-Level - Modules 1-4 with complete solution what is water of crystallisation? water molecules that make up part of the crystal structure of a solid define relative isotopic mass the ass of an atom of an isotope of an element relative to one twelfth the mass of an atom of C-12 why is relative atomic mass written as a decimal? it is a weighted average mass define molecular formula the actual number of atoms of each element in a compound define what an orbital is a region...

AQA GCSE Chemistry Paper 1 What is an *atom*? Ans- smallest part of an element What is an *element*? Ans- a substance that contains only one type of atom What are *chemical symbols*? Ans- - the letter or pair of letters that represents an element. - first letter is always capitalized What are *compounds*? Ans- substances in which atoms of two or more elements, which are chemically combined What is a *chemical formula*? Ans- a combination of symbols that shows the ratio of elements in a ...

AQA Chemistry Paper 1 Correctly Answered Exam Questions 2024.C1 Atomic Structure - CORRECT ANSWER What are atoms? - CORRECT ANSWER Atoms are the particles that make up everything What is an element? - CORRECT ANSWER An element is a substance in which all the atoms are the same Where are elements shown? - CORRECT ANSWER Elements are shown in the Periodic table How many elements are there? - CORRECT ANSWER There are around 118 elements What is a compound? - CORRECT ANSWER A compoun...

AQA GCSE Chemistry What is a mixture? - ANS Two or more elements not chemically bonded What is the difference between a compound and a mixture? - ANS Compounds have a fixed composition whereas mixtures do not. Mixtures are not chemically bonded but compounds are. Describe the process of filtration - ANS Pour the mixture onto the filter paper, the liquid simply passes through the filter paper into the flask. The insoluble solid cannot pass through and so it stays on the paper...

AQA GCSE Chemistry Paper 1 Marking Scheme for 2022-VerifiedWhat is an atom? - Ans<Smallest part of an element that can exist What is an element? - Ans<A substance made up of one type of atom How are elements represented? - Ans<Using symbols, in the periodic table Approximately how many elements are there? - Ans<100 What is a compound? - Ans<A substance made up of two or more elements chemically combined in fixed proportions How are the elements in a compound separated? - Ans<By...