Flourine I guess must be the answer
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Answer:
60.12 miles
Explanation:
Using the calculation formula shown below:
![t_{1/2} =\frac{t}{[tex]log_{2}](https://tex.z-dn.net/?f=t_%7B1%2F2%7D%20%3D%5Cfrac%7Bt%7D%7B%5Btex%5Dlog_%7B2%7D)
\frac{N_{o} }{N_{t} } }[/tex]
where:
is the half life, 
is the original amount of F-18, and 
is the remaining amount of F-18 at time t.
Generally, F-18 has an half life of 1.83 hours.
Therefore:
![t = 1.83*[tex]log_{2}](https://tex.z-dn.net/?f=t%20%3D%201.83%2A%5Btex%5Dlog_%7B2%7D)
\frac{100}{68} = 1.02 hours[/tex]
Therefore using a speed of 59 miles/hour, the closeness of the hospital is:
distance = speed*time = 59*1.02 = 60.12 miles
Answer:
B. convention
Explanation:
hope you get the right answer
Answer:
Z³⁺
Explanation:
The ion symbol can be depicted as Z³⁺ .
In this atom, the number of protons is 27 and the number of electrons is 24.
Protons are the positively charged particles within an atom.
Electrons are the negatively charged particles within an atom.
To find the charge;
Charge = Number of protons - number of electrons
Charge = 27 - 24 = +3
The atom is positively charged and it can be depicted as Z³⁺
