First one I believe is 5.
2nd is given already
3rd is 1
4th is 2
The farthest electron from the nucleus is the 4p orbital because it’s the highest electron but the farthest.
At 25°C, the solubility product of Hg2Cl2 in water is 3.2
Copper is sought because it is a very useful metal used for conducting heat and electricity, its made of one pure element called copper (not surprisingly) and is slightly uncommon. Making its demand higher.
