General Knowledge - General Science - Discussion

Well, technically, a pencil has the lead and it uses something to compress it to write the information needed. BTW's, in history, Egypt used a stylus to write. But, as my inference, I say it came from there to us. In some way shape and form they let us use their technique and we, the people, took it from there.

Also, graphite is non-reactive to skin and paper.

Also, graphite is non-reactive to skin and paper.

I agree with you @Lily.

The graphite has van der Waals forces between its layers and this makes it soft when writing.

Hi, @Tin. Your explanation is correct. I think so that the substance is clay powder.

Graphite is another giant covalent structure made of carbon atoms. In graphite, each carbon atom is joined to three others, forming layers:.

Diagram showing graphite structure.

The bonds between the layers are much weaker than covalent bonds. This enables the layers to slide over each other, making graphite soft. Graphite can also conduct electricity, between the layers of carbon atoms.

Graphite is used as pencil 'lead'. As the pencil moves across the paper, layers of graphite rub off.

Graphite is the correct answer.

Graphite is softest form of carbon and is used in lubrication.

What is the atomic number of graphite?

Graphite is the answer.