My sdcard is showing up in storage, but I can't place apps on it. 0 My sdcard is mounted, but I can't store apps to it. My HP tablet run Android 4.2.2. 

This is a new Sdcard.
Unless you have a rooted phone with a proper Android ROM, you will not be able to place all apps in the SD card. Specific apps allow you to do so, but others, like Whatsapp, don't even allow to place media on the external storage. That's a shame. 

Starting with (non-rooted) standard Android 4.2.2 ROMs, apps no longer can have full access to SD card.