Chemistry 1.1 -nature of substnces 0.0 / 5 ? Chemistrynature of substancesGCSEWJEC Created by: Liam100109Created on: 19-05-24 17:28 What does the atom's nucleus contain? protons(+) neutrons (0) 1 of 30 What is the charge of a nucleus neutral charge 2 of 30 What do orbit shells contain electrons(-) 3 of 30 How does an atom become an Ion if it gains an electron it becomes a negative ion if it loses an electron it becomes a positive ion 4 of 30 What is the mass number number of protons and neutrons in the nucleus 5 of 30 What is the atomic number the number of protons in the nucleus 6 of 30 can elements be broken down into simpler substances, why? No, because they are the basic building blocks of all substances 7 of 30 What is an element a substance made of only one type of atom 8 of 30 What is a compound A substance that contains two or more elements chemically bonded together 9 of 30 What happens during a chemical reaction atoms are rearranged 10 of 30 how do ionic compounds form transfer of electrons from metal to non-metal atom 11 of 30 What are isotopes different atomic forms of the same element which have the same number of protons but a different number of neutrons 12 of 30 What is relative atomic mass the average mass of the isotopes of and element. 13 of 30 what is relative abundance means how much there is of each isotope compared to the total amount of the element in the world. 14 of 30 what is relative molecular mass total mass of a compound 15 of 30 what is the %mass equation relative atomic mass x atoms devided by molecular mass 16 of 30 What is the mole a term that describes 6.02 x 10^23 atoms 17 of 30 What is the mole defined as NO. atoms in 12g of carbon 18 of 30 what is the equation for number of moles mass(g) of element devided by molecular mass 19 of 30 How do you work out %yield actual yield devided by predicted yield x100 20 of 30 What is a mixture made from different substances that are not chemically bonded 21 of 30 How can atoms/molecules be seperated filtration evaporation chromatogrophy distilation 22 of 30 What does filtration do separates an insoluble solid from a liquid e.g sand in water 23 of 30 what does evaporation do Seperates soluble solids from a liquid 24 of 30 What does chromotography do seperates mixtures of coloured pigments 25 of 30 What is the Rf value distance moved by pigment devided by distance moved by solvent 26 of 30 What does distillation do separates water with liquids due to different boiling points 27 of 30 How do we knwo if a chemical reaaction has taken place Change in temperature change in colour e.g rusting 28 of 30 What does exothermic mean heat is given out 29 of 30 what is endothermic heat is absorbed 30 of 30
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