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Science Ch.1 Sec.2

Atoms, Bonding, and the Periodic Table

alkali metals an element belonging to group 1 of the veridic table, very reactive
halogens an element beloning to group 17of the periodic table, react easily with other elements whose atoms can give up or share electrons
noble gas an element of group 18 of the periodic table,they do not react easily with othe elements
family elements in the same vertical column of the periodic table also called a group
group elements in the same vertical column of the periodic table also called family
period elements in the same horizontal row of the periodic table
symbol a one or two letter set of characters that is used to identify an element
atomic number the number of protons in the nucleus of an atom
chemical bond the force that holds atom together
electron dot diagram a representation of the valence electron in an atom using dots,it includes the symbol for the element surrounded by dots
valence electrons the electrons that are the highest energy of an atom and that are invaded in chemical reactions
Created by: rsummers