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science vocab 2

chapter 2 science vocabulary

alkali metals lithium, sodium, potassium, rubidium, cesium, and francium.
alkaline earth metals beryllium, magnesium, calcium, strontium, barium, and radium.
atomic mass expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom.
atomic number the number of protons in the nucleus of an atom
Bohr model positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus
chemical symbol A chemical symbol is a code for a chemical element. It is usually derived from the name of the element, often in Latin.
electron shell an orbit of electrons around an atom's nucleus.
halogens fluorine, chlorine, bromine, iodine, and astatine.
metal a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity.
metalloid properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors.
multiple ion charge for some transition metals and some non-metals, they can have more than one charge.
noble gases helium, neon, argon, krypton, xenon, and radon,
non-metal do not exhibit metallic properties, generally located in the upper righthand corner of the Periodic Table.
valence electron mostly can only be in the outermost electron shell. In a transition metal, a valence electron can also be in an inner shell.
valence shell can only be the outermost electron shell. In a transition metal, a valence shell can also be an inner shell.
Created by: ihiggins