<Ul> <Li> brittle </Li> </Ul> <Ul> <Li> brittle, when solid </Li> <Li> some (C, P, S, Se) have non-brittle forms </Li> </Ul> <Li> brittle, when solid </Li> <Li> some (C, P, S, Se) have non-brittle forms </Li>

List four physical properties of metals nonmetals and metalloids