The Periodic Challenge game contains questions about the first 20 elements of the periodic table. Question content: There are 72 random questions such as Elements, Symbols, Groups. There are answers to the questions in the table section. While solving the questions, if you answer incorrectly, you will be shown the correct answer to the question. If you turn off the screen during the game, the game will stop automatically. So the time will not progress. When you answer incorrectly, you can either restart or continue where you left off by watching the video to continue the game. If you know the answers to all the questions, it shows you how long you have completed in minutes and seconds. You can start the game again if you want. The game will allow you to learn the first 20 elements of the periodic table. You can write your requests and suggestions in the comments section. If you like our game, don't forget to give 5 stars. Good Games!