Which column of the periodic table is commonly called the alkali metals?
A) 1A
B) 2A
C) 7A
D) 8A
A
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Why is predation considered beneficial at the population level but harmful at the individual level?
What will be an ideal response?
Papua New Guinea had been a colony of which nation?
A) Indonesia B) United States C) United Kingdom D) Australia E) Japan
Which of the following is true of manufacturing jobs in the U.S.?
A) They have been shifting within the United States from the North and East to the South and West B) They have been shifting within the United States from the South and West to the North and East C) They have been shifting within the United States from the West and East to the South and North D) They have been shifting within the United States from the East and West to the North E) They have been shifting within the United States from the North and West to the East
Whether a hydrogen-based energy system is environmentally cleaner than a fossil fuel system depends on ________
A) the car driven B) governmental incentives for research C) the source of energy used to produce the hydrogen D) the source of oxygen used for the process