Identify the process you would predict to have an increase in entropy?

a. condensation of water
b. freezing water
c. melting ice
d. deposition of co2 (changing from a gas to solid)

C. melting ice

Entropy is increases anytime it makes a bigger mess or creates disorderly. Entropy is decreases anytime it cleans up a mess. For example, condensing mist in the air into one droplet organizes the mess and that would be negative entropy. I hope this is making sense.

C. melting point is the process you would need

B

Explanation:

Isotopes are elements which have same atomic number but different mass number.

General representation of an element is given as:

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

Thus for helium , which is shown to be

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons  = 4

Number of neutrons = 4-2 =2

Atomic number is defined as the number of protons or number of electrons that are present in an atom.

Atomic number = Number of electrons = Number of protons  = 2

Thus the representation with 2 protons and 2 neutrons will be the most common isotope of helium.