Yes. This phone normally has NFC functionality available for scanning NFC tags.
The performance of mobile phones with regards tag scanning varies considerably. In fact, it can vary across models and one phone from Google can perform quite differently from another phone in the Google range. The design and size of the tag antenna and the compatibility of this matched with the antenna within the phone can affect performance and distance considerably. Generally, the NTAG21x series chips perform better than the others in terms of scan distance but as with all things technical, test your Nexus 5X against different tags before going to production.
Yes, most versions of the Nexus 5X can write/encode NFC tags with an App. Seritag have put together a step by step tutorial on encoding NFC tags with an Android mobile phone.
The table below illustrates the available NFC tags and their compatibility with your phone. As phone specifications can change without notice and also vary from region to region, we strongly advise testing tags before any purchase.
|MIFARE Ultralight® EV1||Yes|
Depending on what information you need to store on your NFC tags, you will have different memory requirements. NFC Tags have a very limited memory so getting a tag that will store everything you need is important. Seritag have put together some information on how much memory you will need in your NFC Tag.