Ayu, Hena Dian, Akhmad Jufriadi, and Ratri Andinisari. 2021. “High Impact on students’ Understanding of Atomics Radius on Crystals Geometry Concept through Implementation of JITT With 3D Animation ”. Momentum: Physics Education Journal 5 (2):153-60. https://doi.org/10.21067/mpej.v5i2.5557.