They both turn something on, and the way they are different is the way they turn it off<span>
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The compound NaCI is an example of a salt. Salt is formed from a neutralization action of an acid and a base. From the type of reaction itself, we can say that the pH should be neutral or at pH 7.0. No matter what type of acid or base is used.
Cs -137 has a half life of about 30 years. If 60 years pass, there is two half lives passed so 1/2 * 1/2= 1/4. Take 1/4 and multiply it with the mass given:
(1/4)*20mg=5mg left
They have different number of Neutrons and protons, so their masses are different
Hope this helps!
The best thing for her to do next is go get an allergy test from the doctors to see if she’s allergic.