What is the electron configuration for Li which has three electrons?
A)
1s3
B)
1s12s2
C)
1s22s1
D)
1s21p1
E)
1s11p2
C
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Which of these nuclei has the least mass?
A) hydrogen B) iron C) lead D) uranium E) all the same
A rainbow is a result of:
a. the Huygens Effect. c. dispersion. b. different color droplets of water. d. interference.
Modern day living stromatolites which resemble ancient stromatolites very closely have been found in
A) the Yucatan peninsula, Mexico B) South West Greenland C) Western Australia D) Yellowstone National Park, U.S.A.
When an object is effectively isolated from external torques, like an ice skater twirling on the tip of one skate, the angular momentum of the object
a. can be increased by shifting mass out away from the axis of rotation. b. can be decreased by shifting mass out away from the axis of rotation. c. can be increased by shifting mass in toward the axis of rotation. d. can be decreased by shifting mass in toward the axis of rotation. e. cannot be changed except by friction at the point of contact.