Atomic Structure and the Periodic Table Atomic Structure and the Periodic Table 0.0 / 5 ? ChemistryThe Periodic TableAtoms and compoundsGCSEAQA Created by: aizaaliCreated on: 12-04-17 13:18 Atom The smallest particle of matter that can take part in a chemical reaction 1 of 31 Element Substance that consists of one type of atom 2 of 31 Molecule A group of atoms bonded together, representing the smallest unit of a chemical compound that can take part in a chemical reaction 3 of 31 Neutron number= Mass number - Atomic number 4 of 31 Atoms in the same group of the periodic table... Have the same number of electrons in their outer shell 5 of 31 Atoms in the same period of the periodic table... Have the same number of energy levels, where a new energy level begins 6 of 31 Atoms of the same element... Have the same number of protons and electrons 7 of 31 Isotopes Atoms of the same element with the same number of protons but a different number of neutrons 8 of 31 Relative atomic mass An average value that takes account of the abundance of the isotopes of the element 9 of 31 RAM= (x+y)+(w+z) / total number 10 of 31 Elements with full outer energy levels are... Stable and unreactive 11 of 31 Mendeleev knew that... The elements known were organised into order of the relative atomic mass 12 of 31 Compounds' elements can only be separated by... Chemical reactions 13 of 31 Mixtures have no... Chemical bonds between atoms of the different substances in a mixture 14 of 31 Filtration separates... An insoluble solid from a liquid 15 of 31 Evaporation separates... Solution of soluble solid in a liquid 16 of 31 Distillation separates... Solvent from a solution 17 of 31 Chromatography separates... Dyes/soluble solutions 18 of 31 Fractional distillation separates... Mixture of liquids 19 of 31 Diatomic molecules = HOFBrINCl 20 of 31 Group 1 elements are... Alkali metals 21 of 31 Features of Alkali metals are... Silver/grey, soft, tarnish quickly, very unreactive, good conductors of electricity, densities are below 1, float on water 22 of 31 Group 7 elements are... The Halogens - coloured elements, poisonous, diatomic molecules 23 of 31 As you descend down the group, the Halogens... Increase in atomic size, decrease in reactivity, increase in melting point, increase in boiling point 24 of 31 More reactive halogens... Displace less reactive halogens in halide solution 25 of 31 A halogen becomes a halide when... It becomes an ion or gains an electron 26 of 31 Group 0 elements are... The Noble gases 27 of 31 Noble gases have... Low boiling points and low densities 28 of 31 Noble gases are used for... Lights, MRI scanners 29 of 31 Transition metals are... Good conductors of heat and electricity, dense, strong, shiny and hard, high melting/boiling points, malleable and ductile 30 of 31 Chemical properties of transition metals Not very reactive with water, coloured compounds, used as catalysts 31 of 31
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