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