Biology, 30.05.2020 04:58 tonimgreen17p6vqjq

Pencil lead is dull and brittle. That's why it breaks off when you drage it across paper. Therefore, pencil lead is made out of an element that is a ?
- non-metal
- metal
- metalloids
- metalloid

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Pencil lead is dull and brittle. That's why it breaks off when you drage it across paper. Therefore,...