Gallium

1. Gallium

2.GA 3.**Period Number:** 4 **Group Number:** 13 **Group Name:** none 4.It was discovered by Paul-Emile Lecoq de Boisbaudran in 1875 in France. 5.At room tempreature it's a solid. 6.Colour is a silvery white. 7.The atomic number is 31 and the atomic mass is 69:723 amu. 8. 9.The number of Protons and Electrons are 31. And the number of Neutrons is 39. 10.The melting point is 29.78c. the boling point is 2403.0c. 11.It is a rare metallic element. 12.This metal is soft enough to be cut with a knife at room temperature. .It becomes liquid when heated slightly. .It is stable in the air and water but it reacts with and dissolves in acids and alkalis. .The name originates from the word gallus. .gallium does not exist in pure form of nature.