In clinical applications, the unit parts per million (ppm) is used to express very small concentrations of solute, where 1 ppm i
s equivalent to 1 mg of solute per 1 L of solution. Calculate the concentration in parts per million for each of the solutions. There is 25 μg of calcium in a total volume of 57 mL .
1 answer:
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Answer:
Option (d) is correct
N³⁻ > F⁻ > Mg²⁺ > Si⁴⁺
Explanation:
Total electrons for all the species = 10
So these are <u>iso electronic</u> with each other.
We know
Ionic radii ∝
- Si⁴⁺ has 14 protons and 10 electrons
- Mg²⁺ has 12 protons and 10 electrons
- N³⁻ has 7 protons and 10 electrons
- F⁻ has 9 protons and 10 electrons
- Iso electronic species with greatest number of protons have small size and vice versa.
- So Si⁺⁴ have smallest size and N³⁻ have largest in size