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Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?
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For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have
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At a temperature of 393 k, the temperature of a sample of nitrogen is 1.07 atm what will the pressure be at a temperature of 478 k
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Identify and describe the three ways that mutations affect organisms.
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