We are the original creators of the Heritage Periodic Table, an acrylic periodic table with 83 real elements inside. We are also the original creators of the Heritage Personal Museum, a collection of 33 historical artifacts and rare specimens.
Halogen FRs, like their name suggests, are molecules that incorporate elements from group VII of the periodic table—F, Cl, Br, and I. They can vary widely in chemical structure, from aliphatic to aromatic carbon substrates that have been per-halogenated (all hydrogens replaced with halogen at...
If we look at Group I (red column), we see that it is labeled alkali metals . Also note the green H above the alkali metals. All of these elements have a similar configuration of outer-shell electrons (see Table below ). In each case, there is one electron in the outer orbital and...
The periodic table turns 150 years old in the year 2019, which has been appropriately designated as theInternational Year of the Periodic Tableby the UNESCO Organization. To many scientists the periodic table serves as an occasional point of reference, one that is generally considered to be someth...
To learn more about the set you can visitmy page about element collectingin a periodic table layout Done properly, thermite burns vigorously but not explosively, and you can controllably create a mass of molten steel falling out the bottom of a ceramic cone. This steel can be used to make ...
In the second pass, the pixels are relabeled using the equivalency table. Union-Find establishes one label as the root label of a tree, and the root is considered the representative label. Each pixel is then labeled with the representative label. Union-Find is therefore appropriate for represen...
Short history of how the Periodic table of chemical elements was arranged, from Lavoisier's Table of simple substances to Seaborg Actinide concept.
Table 1. History of recurrent fever descriptions. Birth and deathAuthorOriginProfessionWritingChosen citation(s)Possible relation with AIDsReference c. 460 BC to c. 370 BC Hippocrates Greek Physician Aphorisms Section IV, aphorism 43: Fevers, …/… if they intermit in any form, this indicates th...
I have a feeling this one might be a relatively modern reproduction, because the pans are labeled "TAIWAN" on the bottom. I'm no expert, but I doubt that such an item would have been made in Taiwan in the 1800s. Of course I could care less whether it's old or new: Either way ...
Combined image (Z2,φ1) is also labeled to indicate that it corresponds to the first phase of the periodic motion because each of its component images substantially represents a same phase. Next, arrow 84 indicates the combination of image (Z1,φ1) with image (Z2,φ1) to generate ...