Chemistry Crosswords

Helium was found on the Sun before it was found on Earth, in 1868 scientists noticed its line in the spectrum of sunlight, while on our planet the gas was isolated almost three decades later. Chemistry crosswords on crossword.by are made of facts, terms and names like that, from chemical elements and their symbols to simple and complex substances, famous reactions and experiments. Among the scientists you will of course meet Mendeleev, who drew up his periodic table in 1869, and Marie Curie, the only woman to win the Nobel Prize in two different sciences. Some questions test the basics such as the atom, the molecule and valence, while others go into narrower topics like organic chemistry or the properties of metals, for example which of them stays liquid at room temperature. A crossword like this works well for pupils before a test and for adults who want to refresh the periodic table without a textbook and without any fear of a bad mark. Hints and answer checking are built right into the interface, so you can solve it whenever you like, on your phone during a commute or on your computer in the evening.