Transferring or sharing electrons between atoms forms a covalent bond.<span> Covalent
bonding is when atoms share electrons. It is a chemical bond that involves the
sharing of electron pairs. These pairs are called bonding pairs. Examples of
compounds that has covalent bonds are CO2, organic compounds, lipids and
proteins.</span>
Yes, i believe that it can have a physical change but it is most likely chemical.
The formula of Density is known as:
Density = mass/volume
Units: g/cm^3
Hope this helps!
