I\'m making a navigation menu, should I be using the element or element for that?
If I use a nav I\'ll
nav is an semantic html5-element, which was introduced to point out, that this code is the navigation of your page. For "normal nonsemantic" search engines it makes no difference wether you use ul or nav. They will understand both without problems. At the moment using those semantic elements creates no real advantage for you.
Be careful, using those html5-elements breaks IE, so you need to "register" them, so IE recognizes them as stylable html-elements.