(via TEDEd) Within the periodic table loom many potential hazardous elements. Some elements are dangerous due to their toxicity. Others are dangerous because of how they respond, react, or even ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...