Electrons in the outermost shell are referred to as ______________ electrons
a. valence
b. orbital
c. f shell
d. s shell
a
Physics & Space Science
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Which of the following is true of Mars?
A) It is about 95 percent of Earth's diameter. B) It has a thick atmosphere rich in water vapor. C) It is the smallest planet of the Solar System. D) It has a heavily cratered crust marked by volcanoes.
Physics & Space Science
The acceleration of an object acted on by a net force perpendicular to the direction of the object's original motion
a. causes a change in direction. b. is described by Newton's laws. c. causes a change in velocity. d. all of these
Physics & Space Science
The mass density of normal air is, at a particular temperature, 
If the average molecular mass of air is 29.0 u, how many air molecules are in spherical balloon of radius 15.0 cm?
a. 
b. 
c. 
d. 
e. 
f. 
Physics & Space Science