Which of the following statements are true concerning product distribution in the halogenation of an alkane? a. Halogenation of alkanes follows a chain mechanism.
b. The initiation process involves the formation of a halogen molecule.
c. Heat or UV light causes the weak halogen bond to break.
d. A radical is an intermediate with a single unpaired electron.
e. Halogenation of alkanes is a rearrangement reaction.

clouds form

solid ice forms on leaves.

water droplets form on grass.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

the increase of protons   hope this

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