In 1869, a professor at the University of St. Petersburg, Russian chemist Dmitri Mendeleev (1834–1907), devised a diagram in which he arranged the approximately 60 known chemical elements by order of ...
BROMINE was discovered by French chemist Antoine-Jérôme Balard and is an element that can be found on the periodic table. The chemical is known as a naturally occurring element, and when handled ...
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 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback