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