PSH Unit Exam

Question Answer
Periods horizontal rows of elements that represent the number of electron energy levels in an atom
Group/Family each vertical column with the resemblance between elements in the same column
Metal rows 4-7; strong, hard, and shiny elements with high luster and that are good conductors of heat/electricity
Non-metal found on the upper right side of the P.T.; not good conductors of heat or electricity
Metalloid found in a staircase pattern on the periodic table; very diverse group of elements
Activity Series of Metals a list of metals ranked in order of decreasing reactivity to increasing reactivity to displace hydrogen gas from water and acid solutions
Alkali Metal Group 1 elements; violently reactive metals
Alkaline Earth Metal Group 2 elements; reactive metals
Halogens Group 7 elements; poisonous gases
Luster a gentle sheen or soft glow, especially that of a partly reflective surface
Malleable able to be hammered or pressed permanently out of shape without breaking or cracking
Brittle when subjected to stress, it breaks without significant plastic deformation
Noble Gases Group 8 elements; inert gases
Inert chemically inactive; having little or no ability to react
Valence Electron a single electron or one of two or more electrons in the outer shell of an atom that is responsible for the chemical properties of the atom.
Ion an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons
Anion a negative ion which is created by an electron gain and is attracted to the anode
Cation a positive ion which is created by electron loss and is attracted to the cathode in electrolysis

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