Chemistry Test Study Guide Graded A+

nuclear reaction or transmutation {Ans: process in which the nucleus of an atom loses or gains protons producing a new element}group 18 on the periodic table is known as {Ans: noble gases}nuclear fusion {Ans: when the nuclei of two or more atoms join or fuse together forming the nucleus of a larger atom}lanthanide series {Ans: follow lanthanum in period 6; all are naturally occurring except for one; once thought to only occur in small amounts in earth's crust; fill in the 4f sublevel; shiny metals}give three reasons why atomic radii increases down a group {Ans: increase in the number of energy levels outer level electrons are further from the nucleus increase in the shielding effect}what is an ion {Ans: an atom that gains or loses electrons which makes it charged}what does the modern periodic law state? {Ans: the physical and chemical properties of an element are functions of its atomic number}group 13 on the periodic table is known as {Ans: boron group}as you go left to right, atomic radii increases or decreases {Ans: decreases}what do all periods have in common? {Ans: they have the same number of occupied energy levels}what