5️⃣1️⃣🥈✨

#atomic number 51 #antimony #sb #element 51 #metalloid #silvery #brittle metal

🪨💪🔵

#hard metal #brittle metal #dense metal #blue osmium #high melting point

4️⃣4️⃣⚙️🛡️

#ruthenium #atomic number 44 #hard metal #brittle metal #element 44 #industrial use