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Chemistry



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1 a grouping of electrons surrounding the nucleus of an atom
4 the smallest particle of a chemical element that can exist.
7 a material system made up of two or more different substances which are mixed but are not combined chemically
9 a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
10 the temperature at which a liquid boils and turns to vapour.
12 a negatively charged ion, i.e. one that would be attracted to the anode in electrolysis.
13 a set of chemical symbols showing the elements present in a compound and their relative proportions.
16 horizontal row of the periodic table.
17 a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
19 Any of various particles of matter that are smaller than a hydrogen atom
20 the temperature at which a given solid will melt.
23 is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent
24 is a separation technique that is used to separate. a solid that has dissolved in a liquid and made a solution
27 the separating of the constituents of a liquid by boiling it and then condensing the vapor that results
28 substance consisting of atoms which all have the same number of protons
30 a technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.
32 any of various mechanical, physical or biological operations that separate solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass
37 relating to stationary electric charges or fields as opposed to electric currents.
40 a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
41 The central part of an atom that contains the protons and neutrons
42 of or containing water.
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2 a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
3 a homogeneous mixture composed of two or more substances
5 a solid material which is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity
6 is a column of elements in the periodic table of the chemical elements
7 Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements (1834-1907)
8 a form of carbon consisting of planar sheets which are one atom thick, with the atoms arranged in a honeycomb-shaped lattice.
10 a form of carbon having molecules of 60 atoms arranged in a polyhedron resembling a geodesic sphere.
11 Of or relating to a body having fewer electrons than protons
14 a grey crystalline allotropic form of carbon which occurs as a mineral in some rocks and can be made from coke. It is used as a solid lubricant, in pencils, and as a moderator in nuclear reactors
15 a conserved property of certain subatomic particles that determines their electromagnetic interaction.
18 each of two or more different physical forms in which an element can exist. Graphite, charcoal, and diamond are all allotropes of carbon.
20 the smallest particle in a chemical element or compound that has the chemical properties of that element or compound
21 is a regular arrangement of particles
22 a positively charged ion that is attracted to the cathode in electrolysis
25 (of a chemical bond) formed by the electrostatic attraction of oppositely charged ions.
26 an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons
29 is a method to achieve any phenomenon that converts a mixture of chemical substance into two or more distinct product mixtures
31 a precious stone consisting of a clear and colourless crystalline form of pure carbon, the hardest naturally occurring substance.
33 all the material to be transfered from one place to another must make the trip
34 each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
35 relating to or denoting chemical bonds formed by the sharing of electrons between atoms.
36 (of a metal or other material) able to be hammered or pressed into shape without breaking or cracking.
38 a material which contains movable electric charges
39 a substance formed when two or more chemical elements are chemically bonded together.
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