Titanium is an extremely strong metal which resists attack by acids. Vanadium V Named after Vandis, the Scandinavian Goddess of Beauty. The salts of vanadium have beautiful colours. Argon is one of the laziest, least reactive elements of all. Bromine has an unpleasant smell.
Chlorine is a green gas.
Miners working in the cobalt mines sometimes died unexpectedly. For this reason the miners thought that the mines contained evil spirits. The real reason for these unexpected deaths was that cobalt ores usually contained highly poisonous arsenic. Dust from the ore probably got on their food or was breathed in, causing sudden deaths. When hydrogen burns in the air, it forms water.