Jadaflournoy5
09.01.2020 •
Biology
Short answer :
if the half life of a certain element is 2 hours, how long will
ittake for 93.75% of a certain amount of the element to
radioactivitydecay ?
Solved
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Ответ:
It will take 8 hours for the element to decay
Explanation:
Half life: This is the time taken for half the total number of atoms in a given sample of a radioactive element to decay.
λ/λ₁ = 2(ᵃ/ⁿ) Equation 1
λ₁ = radioactive remain, λ = original amount, a = total disintegration time, n = half life.
Given: λ = 100%, λ₁= 100-93.75 = 6.25%, n = 2 hours.
Substituting these values into equation 1,
100/6.25 = 2(ᵃ/²)
16 = 2(ᵃ/²)
2⁴ = 2(ᵃ/²)
Equating the base from both side of the equation,
4 = a/2
a = 4×2
a = 8 hours.
Thus it will take 8 hours for the element to decay
Ответ:
The correct answer is D) energy
Explanation:
Hope this helped Mark BRAINLIEST!!