Gold is the most malleable; and it can be made into leaves so thin that three hundred and sixty thousand of them, when placed together, make a bulk only one inch in thickness.

Name some other metals that are malleable.

Silver, copper, tin, zinc, iron, and lead.

Can the particles of a piece of iron easily be separated?

No; its particles cannot easily be separated.

What is this property of iron called?

It is called Tenacity.

Can the particles of a brittle substance, like glass, easily be separated?

Yes; its particles can easily be separated.

Is there much tenacity in brittle substances?