The capitalization is not necessary.
Uranium should only be capitalized if it is the first word in the sentence. It is not a proper noun.
Yes, "Uranium" should be capitalized as it is a proper noun and the name of a chemical element.
The word 'will' should be capitalized only when it is a person's name or the first word in a sentence. As a verb or common noun, it should not be capitalized.
The second word should not be capitalized
Yes, Sunday should always be capitalized.
As an abbreviation it should be capitalized.
No, the word "smartphone" should not be capitalized unless it is at the beginning of a sentence.
The word "banker" should not be capitalized unless it is at the beginning of a sentence or part of a title.
No, the word "epitaph" should not be capitalized unless it is at the beginning of a sentence or part of a title.
Yes, Greek should be capitalized.
Yes it should be capitalized.
No it shouldn't be capitalized.