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lbvjy [14]
3 years ago
11

Do electrons have psrticle nature or wave nature?​

Chemistry
1 answer:
densk [106]3 years ago
4 0

Explanation:

they have wave nature

its correct answer

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Geologists use the decay of potassium-40 in volcanic rocks to determine their age. Potassium-40 has a half-life of 1.26 109 year
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Answer:

m_{o} \approx 3.247\times 10^{-7}\,g

Explanation:

The mass of radioactive isotope at a certain time is given by the following expression:

m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }

Time constant can be calculed in terms of half-life:

\tau = \frac{t_{1/2}}{\ln 2}

\tau = \frac{1.26\times 10^{9}\,yr}{\ln 2}

\tau = 1.818\times 10^{9}\,yr

The initial mass is:

m_{o} = \frac{2.73\times 10^{-7}\,g}{e^{-\frac{3.15\times 10^{8}\,yr}{1.818\times 10^{9}\,yr} }}

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