2007-02-28 00:45:39 · 13 answers · asked by Arun 2 in Science & Mathematics ➔ Physics
3/4 of the original mass would have disengrated. A half life of 1 year doesn't mean all will be gone in 2 years.
2007-02-28 00:51:57 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The half-life of a radioactive element is 1-year. Therefore it will disintegrate into 1/2 in 1st year. In the 2nd year it will disintegrate into 1/4. Therefore the amount disintegrated in 2-years will be 3/4.
Thank You.
2007-02-28 09:14:02 · answer #2 · answered by sankar s 2 · 0⤊ 0⤋
50 the first year
50 percent of what remains the second year
so 75% will be disintegrated after 2 years
2007-02-28 08:52:34 · answer #3 · answered by SteveA8 6 · 0⤊ 0⤋
Only half of the remaining half will disinitigrate during the second half, leaving 1/4 of the original.
2007-02-28 08:56:01 · answer #4 · answered by Anonymous · 0⤊ 0⤋
If the intensity is X curie then in one year it will be .5X curie.
At the end of the second year remaining intensity will be .25X curie only.
So .75X curie would have disintegrated.
It's intensity will never be Zero, but it will be very close to zero in few years.
2007-02-28 10:03:11 · answer #5 · answered by minootoo 7 · 0⤊ 0⤋
Half inone year and half of half in next year and so on. so in two years it 3/4 th.
2007-02-28 08:59:57 · answer #6 · answered by John 1 · 0⤊ 0⤋
3/4 ths
2007-02-28 08:57:24 · answer #7 · answered by Anonymous · 0⤊ 0⤋
By 2yrs it might have disintegrated by 3/4th of original mass............
2007-02-28 09:42:58 · answer #8 · answered by Martha S 2 · 0⤊ 0⤋
Half life is 1year,the second year will be half that or one quarter,then one eighth etc.
2007-02-28 08:52:46 · answer #9 · answered by Billy Butthead 7 · 0⤊ 0⤋
75%
2007-02-28 08:52:43 · answer #10 · answered by Mark 5 · 0⤊ 0⤋