What is the difference between angularjs, angle2, reactjs, reachnative?

  node.js, question

Has angularjs been eliminated? Does angular 2 replace angularjs?
The website project currently in hand is still developed by angularjs. Can angular 2 also do these things?
Is angular 2 a mobile app? Is angularjs a web site? Can you understand this?
Is it the same way that reactjs and react native understand each other?

Angular and angular2 are the framework for web APP to make Single page application.
React, strictly speaking, is a mvc programming or design pattern. Abstract into jsx syntax. The default implementation of react is used on the web.
React native is the two implementations of react programming mode on Android and iOS. React can be used to write native applications.