An atom of oxygen has six valence electrons. in nature, oxygen is a diatomic molecule and is usually found in the form o2. why would one atom of oxygen want to bond with another one?

There is an equal electronegativity between the two atoms, so the covalent bond is equal, thus creating a non-polar molecule.

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

The answer is d.potassium