Question

give four reasons to prove that the pen you are writing with is a solid

Answer 1

1. if we touch the pen it seems to be hard
2. the pen does not flow I fly like a gaseous or liquid substance.
3. there are tightly packed molecules in the pen which is a main and important property of a substance to b solid
4. the pen is stable i.f it was a liquid or a gaseous substance rather than solid then it would have not been stable in nature.