A) closely packed B) held in fixed positions C) unevenly distributed D) very far from one another
A) having lost electrons owing to energy content B) having definite shape and definite volume C) having neither a definite shape nor a definite volum D) having a definite volume but not a definite shape
A) atomic nuclei break down B) atoms lose electrons C) atoms form molecules D) atoms gain electrons
A) It is changed into matter B) The energy remains unchanged. C) It is destroyed D) It changes form, but is neither destroyed nor increased
A) vitamin C (ascorbic acid) B) seawater C) bread dough D) vinegar (5% acetic acid)
A) any substance with a uniform composition B) a blend of any two or more kinds of matter, as long as each maintains its own unique properties C) a combination of pure substances bonded chemically D) any group of elements that are chemically bonded to one another
A) homogeneous B) a compound. C) heterogeneous D) chemically bonded
A) random list B) chemical chart C) periodic chart D) element table
A) sucrose B) a gold ring C) salt water D) granite
A) raw milk B) marble C) air D) orange juice
A) periods B) rows of elements C) groups or families D) actinides
A) a good electrical and heat conductor B) very hard C) easy to break down into its components D) very brittle
A) lanthanides B) unreactive C) from outer space D) semiconductors
A) brittle B) malleable C) used to make jewelry D) a good conductor |