fundamental ideas 0.0 / 5 ? ChemistryAtoms and compoundsGCSEAQA Created by: ninaCreated on: 31-05-13 12:29 what are all substances made of? atoms 1 of 37 what is a substance made up of only one type of atom called? element 2 of 37 about how many elements are arranged in the periodic table? 100 3 of 37 which subatomic particles are found in the nucleus of an atom? protons and neutrons 4 of 37 where are electrons found? shells/energy levels surrounding the nucleus 5 of 37 what relative charge and mass does a proton have? positive charge, relative mass of 1 6 of 37 what relative charge and mass does a neutron have? neutral charge, relative mass of 1 7 of 37 what relative charge and mass does an electron have? negative charge, relative mass of 0 8 of 37 why do atoms have no overall charge? they have the same number of protons and electrons 9 of 37 what is the proton (atomic) number and where do you find it on the periodic table? number of protons and electrons in an atom, number bottom left hand corner of the element's symbol 10 of 37 how do you work out how many neutrons are in an atom? difference between mass number and proton number 11 of 37 what is the mass number of an atom? sum of protons and neutrons in the nucleus 12 of 37 which energy level fills with electrons first? lowest/innermost 13 of 37 how many electrons can the first 3 shells hold? 2, 8, 8 14 of 37 what are the horizontal rows of a periodic table called? periods 15 of 37 what are the vertical columns of a periodic table called? groups 16 of 37 where are metals on the periodic table? left 17 of 37 where are the transition metals on the periodic table? middle (between group 2 and 3) 18 of 37 where are the non metals on the periodic table? right 19 of 37 which group are the noble gases? 0 20 of 37 as you go down a group, what happens to the amount of energy levels and amount of electrons in the outer shell? energy levels increase by 1, electrons in outer shell stay the same 21 of 37 as you go across a period, what happens to the amount of energy levels and amount of electrons in the outer shell? energy levels stay the same, electrons in outer shell increase by 1 22 of 37 name 3 properties of noble gases unreactive, full outershells, colourless 23 of 37 why are group 1 metals called alkali metals? they form alkaline compounds 24 of 37 what products are formed when group 1 metals react with water? metal hydroxide and hydrogen 25 of 37 why do group 1 metals need to be stored under oil? to prevent them reacting with oxygen and water vapour in the air 26 of 37 what product is formed when group 1 metals react with oxygen? metal oxides 27 of 37 what's formed when elements react together? compounnds 28 of 37 how are new substances formed? chemical reactions 29 of 37 how do atoms join together in chemical reactions? by using chemical bonds 30 of 37 what is the name of the reaction when a metal gives its outer electron to a non metal? ionic bonding 31 of 37 what are charged particles called? ions 32 of 37 what is covalent bonding? when 2 non-metals bond and share their electrons to form molecules. 33 of 37 what does the conservation of mass mean? the mass of the reactants equals the mass of the products 34 of 37 what does the conservation of mass mean? the mass of the reactants equals the mass of the products 35 of 37 what does a chemical formula of a compund show? how many of each type of atom join together to make up the compound 36 of 37 what is a balanced equation? when there's the same number of each type of atom on the left and right side of the equation 37 of 37
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