Energy has both wavelike and particle-like properties, but electrons have only particle-like properties. true false

The given statement is false.  

The electrons have both wave and particles like properties. It was postulated by De Broglie that electrons have wave nature and suggested that all the matter exhibit wave characteristics. This concept is called the De Broglie hypothesis.  

Like all the elementary particles, the electrons possess the characteristics of both waves and particles, in the sense that they can collide with other particles and be diffracted like light.  

false

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