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∙ 7y agoOut of the substances listed, iron (Fe) would have the greatest ductility. Iron is a metal known for its high ductility property, meaning it can be drawn into thin wires without breaking. The other substances - carbon (C), silicon dioxide (SiO2), and sodium chloride (NaCl) - are not known for their high ductility.
Si02 is the chemical formula for silicon (Si) dioxide. It is major component to consumer and automotive glass, and used by the high tech industries for fabricating fiber optic cables.
It would take an extremely long time, possibly thousands of years, to count all the atoms in a single grain of sand given that a grain of sand contains trillions of atoms. Counting atoms in a grain of sand is practically impossible due to the sheer number and the limitations of our counting capabilities.