How many valence electrons does gallium (Ga, atomic no. = 31 ) have?
A) 1
B) 6
C) 3
D) 31
E) 70
C
Environmental & Atmospheric Sciences
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What is the name for the narrow moist zone above the water table?
a. zone of aeration b. capillary fringe c. water table d. pressure head e. aquiclude
Environmental & Atmospheric Sciences
The Earth's interior is hot because of ________
A) friction B) an inner core of magma C) plate tectonics D) the pull of lunar gravity E) radioactive decay
Environmental & Atmospheric Sciences
The United States did not ratify the Kyoto Protocol because no other industrialized country in the world supported it
Indicate whether the statement is true or false
Environmental & Atmospheric Sciences
Which is not a type of dune?
A. transverse B. barchan C. longitudinal D. parabolic E. All of the preceding are dunes.
Environmental & Atmospheric Sciences