magnezu

In a sentence

• Potrzebuję więcej magnezu w mojej diecie.

  I need more magnesium in my diet.

  Here, 'magnezu' is used as the genitive case of 'magnez' to indicate the necessity for magnesium.

• Na lekcji chemii uczymy się o właściwościach magnezu.

  In the chemistry class, we learn about the properties of magnesium.

  In this sentence, 'magnezu' is again in the genitive case, referring to the properties of magnesium.

• Dodaj trochę magnezu do tego roztworu.

  Add some magnesium to this solution.

  Here, 'magnezu' reflects the direct action of adding magnesium to a solution, conveying the material's involvement in the process.