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