Chemistry Matter

any metal in group 1A of the periodic table

any metal in group 2A of the periodic table

any atom or group of atoms with a negative charge

one half the distance between the nuclei of two atoms of the same element when atoms are joined

any atom or group of atoms with a positive charge

the ability of an atom to attract electrons when the atom is in a compound

a nonmetal in group 7A of the periodic table

an element in the actinide series; highest occupied "s" sublevel and nearby "f" sublevel of its atoms generally contain electrons

an atom or group of atoms with a positive or negative charge

energy required to remove an electron from an atom in its gaseous state

an element that tends to have properties that are similar to most of metals and nonmetals

one of a class of elements that are good conductors of heat and electric current; metals tend to be ductile, malleable, and shiny

an element in Group 8A of the periodic table; the s and p sublevels of the highest occupied energy level are filled

an element that tends to be a poor conductor of heat and electric current; nonmetals generally have properties opposite those of metals

when elements are arranged in order of increasing atomic number there is a periodic repetition of their physical and chemical properties

one of the group b elements in which the highest occupied s sublevel and nearby d sublevel generally contain electrons

an element in our A group in the periodic table; and as a group these elements display a wide range of physical and chemical properties. In their atoms, the s and p sublevels in the highest occupied s energy levels are partially filled