1.Iamchasingmyfuturehusbandataspeedof6.7kilometers/pocoday,andtheZacharyQuintoiscurrently24milesaway(5280ft=1mile,2.54cm=1inch),howlongbeforeIcatchhim?2.Thehalf-lifeofcarbon-14is5730years.After45840years,asampleof

　　1.Iamchasingmyfuturehusbandataspeedof6.7kilometers/pocoday,andtheZacharyQuintoiscurrently24milesaway(5280ft=1mile,2.54cm=1inch),howlongbeforeIcatchhim?

　　2.Thehalf-lifeofcarbon-14is5730years.After45840years,asampleof200gramswillhavedecayedtohowmanygrams?

　　3.Thehalf-lifeofgermanium-66is30.2years.Ioriginallyhadasampleof5grams.Howmanyyearshaveelapsedifmysamplehasdecayedto312.5milligrams?

　　4.Whenanatomgainsorlosesneutrons,theatombecomesa_______________.

　　5.Whenanatomgainsorlosesprotons,theatombecomesa_______________element.

　　6.Whenanatomgainsorloseselectrons,theatombecomesa_______________.