A) held in fixed positions
B) closely packed
C) very far from one another
D) unevenly distributed

A) having neither a definite shape nor a definite volum
B) having lost electrons owing to energy content
C) having a definite volume but not a definite shape
D) having definite shape and definite volume

A) atomic nuclei break down
B) atoms gain electrons
C) atoms form molecules
D) atoms lose electrons

A) The energy remains unchanged.
B) It is destroyed
C) It is changed into matter
D) It changes form, but is neither destroyed nor increased

A) vitamin C (ascorbic acid)
B) seawater
C) vinegar (5% acetic acid)
D) bread dough

A) a combination of pure substances bonded chemically
B) any group of elements that are chemically bonded to one another
C) any substance with a uniform composition
D) a blend of any two or more kinds of matter, as long as each maintains its own unique properties

A) homogeneous
B) a compound.
C) heterogeneous
D) chemically bonded

A) element table
B) random list
C) periodic chart
D) chemical chart

A) sucrose
B) granite
C) a gold ring
D) salt water

A) air
B) raw milk
C) orange juice
D) marble

A) rows of elements
B) groups or families
C) actinides
D) periods

A) very brittle
B) very hard
C) a good electrical and heat conductor
D) easy to break down into its components

A) unreactive
B) semiconductors
C) from outer space
D) lanthanides

A) a good conductor
B) malleable
C) brittle
D) used to make jewelry