If <article> replaces <div id="article">, then how do you refer to it in an external css stylesheet

Question

will you use .article or #article

Answer 1

thanks
but what if you have more than one article and you want to refer to them separately

Answer 2

Use a diferent id for each article
<article id="art1">...
<article id="art2">...
or different class

Answer 3

by assigning them with different id name

Answer 4

#article{
}

Answer 5

for an id we use #
and for a class we use .(dot)

Answer 6

separetly
#article{
}
#art2{
}
multiple id
#article , #art2{
}