Answer:
I'd say about 8?
Explanation:
if you wanna make them huge make about 6
Tenessine used to be called Ununseptium, however since it was only recently regarded as an actual element and the existence of the element has now been proven, it ended up receiving the name Tenessine. The atomic number is 117 and is in a Halogen.
18 g of silicon-32 will be present in 800 years.
A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and it's given by
where,
quantity of the substance remaining
the initial quantity of the substance
time elapsed
the half-life of the substance
From the given information we know:
The initial quantity of silicon-32 is 40 g.
The time elapsed is 800 years.
The half-life of silicone-32 is 710 years.
So, using the calculation above, we can determine how much silicon-32 is left.
Therefore,18 g of silicon-32 will be present in 800 years.
Learn more about half-life here:
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Radioactive decay is expressed by the following formula:
N₀ is the initial number of undecayed atoms.
Nt is the number of undecayed atoms remaining after time t
λ is the decay constant.
The relationship between λ and the half life time t1/2 is:
λ =
= 0.693 / 5.27 = 0.1315
Taking natural logs for both sides of the decay expression:
ln Nt = ln N₀ - λ t
ln Nt = ln 199 - (0.1315 x 20)
= 5.293 - 2.63 = 2.66
From which:
Nt = 14.29 g