Answer:
1:C as all metal are good conductors of heat & electricity
2:D conductivity as it needs delocalized electrons normaly
3:B good conductors of heat & electricity
Tin(II) iodide, also known as stannous iodide, is an ionic tin salt of iodine with the formula SnI2.
They must have the same density
Zn(HCO3)2 is the compound for Zinc Bicarbonate