👉 Lucium, a mineral in the group called rubidium and strontium, is primarily found in the Earth's crust and rocks on Mars. It is an element that has two protons and four neutrons. Its atomic number is 87 and its symbol is Lu.
👉 Lucium, a mineral in the group called rubidium and strontium, is primarily found in the Earth's crust and rocks on Mars. It is an element that has two protons and four neutrons. Its atomic number is 87 and its symbol is Lu.
