<span>Acid is a molecule capable of
donating hydrogen ion and they form aqueous solutions with a sour taste while
base is a substance that accepts proton from proton donor and in aqueous solution,
they have an astringent or bitter taste. Moreover, a good example for base is
sodium hydrogen carbonate as baking soda or baking powder and for acid, the
most common example is the acetic acid or vinegar.</span>
We know that ionic radii trends have the elements ionic radii increasing right to left in a row and top to bottom in a group with Groups 13-18 having their respective exceptions.
That being said, since Ca2+ and Mg2+ are in the same group, we know that Mg2+ has a smaller radius that Ca2+.
So Mg2+ < Ca2+
And we know that Cl- and S2- are both two large atoms, due to them being found in group 17 and 16 respectively. Both of these atoms have a larger radius than Ca2+ due to them being an exception.
So we can write: Mg2+ < Ca2+ < Cl- and S2-
One way to know the exact figures for sure is to have a table on hand with all of the ionic radii. Using a table, we know that the actual ordering of the atoms is:
Mg2+< Ca2+ < Cl- < S2-
Therefore, Mg2+ has the smallest ionic radius.
Answer:
Gamma
Explanation:
I'm not sure how to do it without calculations but:
E=hv
7*10^7 J/mol=6.626*10^34 Js * v
v=1*10^41
Gamma rays.
More here: https://www.hasd.org/faculty/AndrewSchweitzer/spectroscopy.pdf
The fraction of the original amount remaining is closest to 1/128
<h3>Determination of the number of half-lives</h3>
- Half-life (t½) = 4 days
- Time (t) = 4 weeks = 4 × 7 = 28 days
- Number of half-lives (n) =?
n = t / t½
n = 28 / 4
n = 7
<h3>How to determine the amount remaining </h3>
- Original amount (N₀) = 100 g
- Number of half-lives (n) = 7
- Amount remaining (N)=?
N = N₀ / 2ⁿ
N = 100 / 2⁷
N = 0.78125 g
<h3>How to determine the fraction remaining </h3>
- Original amount (N₀) = 100 g
- Amount remaining (N)= 0.78125 g
Fraction remaining = N / N₀
Fraction remaining = 0.78125 / 100
Fraction remaining = 1/128
Learn more about half life:
brainly.com/question/26374513