Chemical Bonds

From watching the video on the different types of chemical bonds, I learnt that ionic bonds are the strongest because there is an actual transferring of valance electrons that takes place. This is when one element really wants to give an electron and the other really wants to take one. The one that gives an electron will become positive and the one that takes will become negative. Now these (+) and (-) sides will attract and that forms the ionic bond.

Now, covalent bonds take place when both elements have similar electronegativity. Meaning they both are indifferent to how many electrons they give or take. Oxygen has 6 electrons. So, if two oxygen molecules decide to share two of their electrons then they are forming a covalent bond, so that they both have 8 electrons.

Lastly, metallic bonds are when a bunch of metals such as Iron (Fe) come together, then they all become positive (+) because they basically donate their electrons in a sea that is between them all.