7. What holds combinations of atoms together in molecules?
O protons and electrons
atomic magnetism
nuclear forces
chemical bonds

Chemical bonds.

Chemical bonds hold the atoms of a molecule together thereby forming covalent bonds, when two atoms share electrons.

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1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.