Explore 3D models of elements categorized into diatomic nonmetals, noble gases, alkali metals, and other groups. View atomic weight, neutron count, proton count, electron count, and shell configuration for each element.
Prepare for the driving license exam with practice quizzes and a free illustrated manual. Track progress, review questions, and access updated exam content. Submit answers and receive immediate feedback.
The app identifies butterflies using a determination key based on 10 questions. It features over 500 nature photos and GPS localization for 150 butterfly species in Germany, Austria, and Switzerland.
