Relier Pairs AtomsVersion en ligne Atoms par Patricia Gallego Galvez 1 J. J. Thomson 2 Jonh Dalton 3 Atom 4 Neutrons 5 Atomic number (Z) 6 Ions 7 Electrons 8 Ionic bond 9 Metalic crystals 10 Periodic Table of Elements 11 Mass number (A) 12 Isotopes 13 Niels Bohr 14 Metalic bond 15 Protons 16 Ernest Rutherford 17 Atomic Shell 18 Covalent crystals 19 Chemical bond 20 Molecule 21 Ionic crystals 22 Covalent bond 23 Atomic nucleus 24 Molecule properties The smallest unit of matter that constitutes a chemical element. Atoms of the same element that have different numbers of neutrons Two or more non-metal atoms held together by covalent bonds Liquids or gases at room temperature. Some can be solid, but they melt at low temperatures. Charged atoms Heavy positively charged particles found within atomic nuclei. The number of protons in the nucleus of an atom Negatively charged particles, with very small mass, found outside the nucleus An atom's dense central core, containing protons and neutrons. A grouping of electrons surrounding the nucleus of an atom A chemical bond formed when non-metal atoms share electrons An attraction between a positive metal ion and the electrons surrounding it The force that holds atoms together The sum of the number of neutrons and protons in an atomic nucleus Very high melting and boiling points, insoluble in water and not good electrical conductors Heavy uncharged particles found within atomic nuclei Very high melting and boiling points, soluble in water and good electrical conductors in solution or molten Formed when one or more electrons are transferred from one metal to non-metal atom A table that classifies elements by their physical and chemical properties; rows are called periods; columns are called groups; From low to high melting and boiling points, insoluble in water and very good electrical conductors
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