Why is it so easy for a magnesium atom to lose two electrons?
A. There are lots of electron-electron repulsions that go on within the valence shell.
B. The nuclear charge of the magnesium atoms is relatively weak.
C. These two electrons are found relatively far from the nucleus.
D. These two electrons are well shielded from the nuclear charge.
Answer: D
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Which of the following is the name given to the piling up of air above a region?
A. divergence B. thickening C. convergence D. cyclogenesis
How many people are estimated to die each year in Great Britain as the result of auto exhaust according to a government study?
a) Approximately 10,000 people are killed each year. b) Nearly half of all deaths in England each year are the result of auto exhaust. c) Strict emission controls have all but eliminated deaths due to automobile exhaust. d) There has been no government study of the health implications of auto exhaust.
The volcanic peninsula which dominates the Far East of Russia is known as
A) Urals B) Baikal C) Siberia D) Caucasus E) Kamchatk
The phenomenon causing the greenhouse effect is that ________ in the lower atmosphere selectively absorb(s) reradiated ________ radiation.
A. Ozone; visible light B. Hydrocarbons; very short wavelength C. Carbon dioxide; ultraviolet D. Carbon dioxide, methane, and other gases; infrared (heat) E. Carbon dioxide, methane, and other gases; insolation