Why hybridized orbital always form sigma bond

When two hybridized orbitals overlap, they form a σ bond. sp³-hybridized atoms use all three p orbitals for the hybridization. This means that sp³ hybridized atoms can form only sigma bonds. They cannot form multiple bonds.

Explanation:

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

answer seismograph;