Pencil lead really contains lead, and toxic
No lead, generally non-toxic
Lead, toxic
Correct answer: no lead, generally non-toxic
Answer Analysis
The main components of the pencil's core are graphite and clay, graphite is a scale-like solid with a metallic sheen, which has a carbon-carbon chemical bonding between layers is van der Waals force, carbon-carbon chemical bonding between layers is van der Waals force, carbon-carbon chemical bonding between layers is van der Waals force, carbon-carbon chemical bonding between layers is van der Waals force, carbon - carbon chemical bonding between layers is van der Waals force. Between the layers is van der Waals force, carbon-carbon chemical bond is very stable, want to destroy is very difficult, there is nothing in the human body can destroy carbon-carbon chemical bond, so I am sure that the pencil lead is safe.
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