5.64 Place the elements in each set in order of decreasing atomic size. a. CI, S,P4
c. Ba, Ca, Sr
b. Ge, Si, C
d. S, O, Se

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.