Which of these elements is the most chemically reactive? A. beryllium (Be)
B. calcium (Ca)
C. strontium (Sr)
D. radium (Ra)
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Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Which radioisotope is used in dating geological formations?

Farmer a has a deep well and needs a lot of water for her animals and crops. her neighbor, farmer b, has a shallower well. he needs less water than farmer a because his farm is smaller. in years of drought, sometimes farmer b can't get any water from his wells. what can farmer b do to decrease the likelihood of his well running dry?