<em>A crystalline solid is a solid material with a regular (crystal lattice) or irregular (amorphous) ordered array of its components,</em> being these molecules, atoms or ions. These arrengements are held in place thanks to the atraction between components, they can be ionic compounds held by their charges, metal cations surrounded by a sea of electrons, covalent networks with their atoms covalently bonded or molecular crystals held together by weak intermolecular forces.
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I think it the carbon 14 which is a half life of 5730 because in 4.5billion years ago I don't think any human being existed on earth I'm not sure I hope that I helped you and good luck .
