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

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, pencil lead is made out of an element that is a ? - non-metal - metal -…

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