1) Sodium-24 has a half life of 15 hours. If a sample of sodium-24 has an original activity of 500Bq, what will its activity be after 60 hours? a) 62.5 b) 250 c) 31.25 d) 75 e) 125 2) The half-life of radon-222 is 3.8 days. What was the original activity if it has an activity of 10 Bq after 7.6 days? a) 10Bq b) 5Bq c) 20Bq d) 40Bq e) 80Bq 3) The half-life of protactinium-234 is 6.75 hours. What percentage of a sample will remain after 27 hours? a) 50% b) 25% c) 12.5% d) 6.25% e) 3.125% 4) The half-life of tritium (hydrogen-3) is 12 years. If 48.0 mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the sample will remain after 49.2 years? a) 3mg b) 6mg c) 12mg d) 24mg e) 48mg

Half life

만든이
인쇄
퍼가기

순위표

비주얼 스타일

옵션

템플릿 전환하기

자동 저장된 게임을 복구할까요?