Answer:
Half-Life = 18 days
Explanation:
Isotope decay follows the equation:
Ln[A] = -kt + ln[A]₀
<em>Where [A] is amount of isotope after time t,</em>
<em>k is rate constant</em>
<em>[A]₀ is initial amount of isotope.</em>
<em> </em>
If we solve rate constant, we can find half-life by using:
Half-life = ln 2 / Rate constant
Replacing in isotope decay equation:
Ln[1/8] = -k*54 days + ln[1]
-2.07944 = -54k
0.0385days⁻¹ = k
Half-Life = ln 2 / 0.0385days⁻¹
<h3>Half-Life = 18 days</h3>
<em />
16 neutrons
Since the atomic mass (30) is equal to the number of protons + the number of neutrons
in an equation, it would be 30=14+x
x=16
The material’s temperature decreased 80 degrees celcius
Answer:
Hey there!
Gold would have a greater mass, because density is mass/volume, and if the density is greater, so is the mass.
Let me know if this helps :)