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.

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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