Gallium
its the fourth row and its grouped other metals
Gallium
A scientist named Lecoq de Boisbaudran discovered it in 1875 it wasn't known until then. scientists new it existed even know it had never been discovered.
You can find Gallium in mirrors, solar devices,and some time thermometers.
Atomic Number: 31
Atomic Weight: 69.723
Melting Point: 29.76°C or 85.57°F
Boiling Point:2204°C or 3999°F
Density: 5.91 grams per cubic centimeter
Phase at Room Temperature: Solid
Element Classification: Metal
Symbol: Ga
Number of Protons/Electrons: 31
Number of Neutrons: 39
Crystal Structure: Orthorhombic
Color: White/Silver/blue
Number of Protons/Electrons: 31
Number of Neutrons: 39
Crystal Structure: Orthorhombic
Color: White/Silver/blue