Chemistry

How many elements in the actinide series are not radioactive?

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Triphenylphosphine can be used to prepare which of the following?
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Which of the following common laboratory chemicals does a person not normally consume?
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What post-transition metal is used to make blue and violet light-emitting diodes (LEDs) and diode lasers?
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What is the chemical symbol for Potassium?
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What is the first element on the periodic table?
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Which of the following activities is an example of changing a physical property?
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Approximately how many toxic chemicals are released while a diesel engine idles?
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Which metal contains 60% copper and 40% zinc?
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