When the temperature of a substance decreases to the substance's freezing point, the substance will begin to change from
a
to a
(assume the substance is at standard atmospheric pressure.)
a
gas, solid
b.
liquid, gas
c.
d.
solid gas
liquid, solid

When the temperature of a substance decreases to the substance's freezing point, the substance will begin to change from a liquid  to a solid.

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).