That would be <span>Johannes Gutenberg a German inventor from the 1400's </span>
Group 14 is the carbon family. The five members are carbon, silicon, germanium, tin, and lead. All of these elements have four electrons in their outermost energy level. Of the Group 14 elements, only carbon and silicon form bonds as nonmetals (sharing electrons covalently).
Yes, you can!
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Substances are matter that has uniform and constant composition: same number and kind of atoms bonded in the same way.The substances are compounds or elements.From the options given, only silver is a substance, because it is an element, and all silver materials have only silver atoms. Air is a mixture of different gases,which may varies in composition; gasoline is a mixture of liquids which may change in composition; steel is an alloy (a mixture of compounds and elements) which varies in composition. So, <span>the answer is Silver.</span>