5.09 grams of solid uranyl nitrate are dissolved in 4.76 L of water at 20°C. Calculate the concentration of uranyl nitrate in parts-per-million.

The answer to your question is ppm = 1069.3

Explanation:

Data

mass of Uranyl nitrate = 5.09 g

the volume of water = 4.76 l

Concentration in ppm = ?

Formula

 ppm = milligrams of solute / liters of solution

Process

1.- Convert the g to mg

         1000 mg 1 g

             x           5.09 g

             x = (5.09 x 1000) / 1

             x = 5090 mg

2.- Calculate the concentration

-Substitution

ppm = 5090 / 4.76

-Result

ppm = 1069.3

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.