The Radioactive Isotope Bismuth-210 Has a Half-Life of 5 Days

question 104

Multiple Choice

The radioactive isotope Bismuth-210 has a half-life of 5 days. How many days does it take for 87.5% of a given amount to decay?

• A)15 days
• B)8 days
• C)10 days
• D)13 days
• E)11 days
• F)9 days
• G)12 days
• H)14 days

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Definitions:

Grignard Reagent

A reactive compound composed of magnesium bonded to a halogen-containing carbon group, used mainly in organic syntheses.

Nucleophile

A chemical species that donates an electron pair to an electrophile to form a chemical bond in reaction mechanisms, often characterized by its negative charge or lone pair of electrons.

Electrophile

A species that is attracted to electrons and can accept an electron pair to form a bond.

Carbocation

A positively charged carbon species, characterized by a carbon atom having only six electrons in its outer shell, making it highly reactive.