The half-life of radium-226 is 1,600 years. It decays into radon-222. What fraction of the original amount of radium-226 in a sample will still be radium after 8,000 years?
A.1/8
B.1/4
c.1/32
D.1/16

Aspirin has a density of 1.40 g/cm3 what is the volume in cubic centimeters of a tablet weighing 320 mg ?

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If two atoms are bonded to a central atom with no lone pairs,how will they be arranged