Compare the ways that hydrogen is made in the laboratory with the ways that it is produced commercially.

The answer is probably c. xylem

The answer is d.potassium

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck