When naming an ID or a Class after the # or the . can you create the reference?

Question

For example #question { and then your html would read <div id="question">

Answer 1

"would read"? No, you have to write that html. Your browser can't read your mind and guess what div is supposed to have the id "question".

Answer 2

U mayor create a coment
/* */ un tour conde CSS
Will remembrer to you where you applied this style, ..