9. The following table lists some information
about certain elements in group 17.
ents
Element
Symbol
Atomic
Number
Melting
Point (°C)
Boiling
Point (°C)
9.
-233
-187
17
-102
-35
Izn
Br
I
35
-7.3
I
59
183
I
53
114
Which statement describes what happens
to these elements as atomic number
increases?
A. Both melting point and boiling point
decrease.
B. Melting point increases and boiling
point decreases.
C. Melting point decreases and boiling
point increases.
D. Both melting point and boiling point
increase.
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hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

answer; how far out of place which the object finished relative to the starting location;