I am quite relieved to learn that you are not an atheist.
"John is an atheist, which means he does not believe in the existence of any gods or deities."
"Because John does not believe in gods, he considers himself an atheist."
"Theodore Roosevelt once refered to Thomas Paine as an atheist, mistaking Paine's deism for a disbelief in God."
Your question is an example, albeit flawed, of a sentence containing the word "atheist."
the atheist later became a scientist :)
I am an atheist.An atheist is someone who doesn't believe in religion.It is everyone's right to choose their own religion and not be abused for it, including those who are atheist.
David is an atheist because he knows that the existence of god cannot be proven.
Atheist would be capitalized only if it were part of somebody's name, for example if somebody referred to himself as Atheist Bob. However, in the sentence "I saw that atheist Bob at the bank today," atheist is not capitalized because it's not part of Bob's name.
Many philosophers have defended atheism; the rejection of the belief in gods.Atheism is the disbelief in gods.
The priest renounced his faith and became an atheist.
This is not a question and it is barely a sentence.