Page auto link to the ID

I'm trying to make the page slug as their ID. Because I'm making one page site.

Here is my code

<?php global $post; ?>

<article id="<?php echo $post->$post_name; ?>">

then I have to add the #id to the page. Is there any way that wordpress auto link page to their ID.? So i will not need to add the ID to the page. And when I click the nav so it auto take me to section(pages that retrieved with WP_Query).

Thanks..