1-20: Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulphur, Chlorine, Argon, Potassium, Calcium. Elements that have similar chemical properties are grouped in columns called groups (or families). alka...
J.W. Döbereinerin 1817 showed that the combining weight, meaningatomic weight, ofstrontiumlies midway between those ofcalciumandbarium, and some years later he showed that other such “triads” exist (chlorine,bromine, andiodine[halogens] andlithium,sodium, andpotassium[alkali metals]). J.-...
The next electrons to be added enter the 4s orbital in preference to the 3d or 4p orbitals. The two elements following argon in the periodic table are potassium, with a single 4s electron, and calcium, with two 4s electrons. Because of the presence of the 4s electrons, the 3d orbitals ...
Animal studies have shown that the concentration of lithium leads to follicular atresia and this adverse effect has been found to result from the induction of apoptosis in antral follicles [44]. The chemical properties of Cs are similar to those of potassium, enabling it to displance potassium ...
Potassium bromate was undetected in the samples. The target hazard quotients of Cr, Cu, and Cd were greater than 1, as opposed to the other elements which were less than 1. The children were the more vulnerable population given that their total target hazard quotient (35.09) was higher than...
Boron and silicon are respectively shortened to bo and silic. On the other hand, neon, krypton and xenon don't seem to have shorter forms. Unlike the other halogens, astatine retains its suffix (astatin in Vietnamese). Some elements have multiple names, for instance, potassium is known ...
To study the impact of the developmental stage - fruiting bodies sorted into six classes from button to fully mature stage - on the status of typical mineral nutrients and environmental pollutants including: lithium (Li), potassium (K), vanadium (V), chromium (Cr), manganese (Mn), magnesium...
Why do lithium, sodium, and potassium exhibit similar chemical properties?What is the Pauli exclusion principle and what does this have to do with the chemical behavior of the elements?How are elements with nuclei heavier than those of hydrogen and...
The first method that Davy tried was to pass an electric current through a water solution of one compound or the other. But no new element was ever formed. What Davy did not know was how active the elements potassium and sodium are. Both elements are freed when an electric current is ...
The first group, thealkali metals, thereby includes, in addition to lithium and sodium, the metals from potassium down the table to francium but not the much less similar metals of Group 11 (Ib;copper, etc.). Also the second group, thealkaline-earth metals, is considered to includeberyllium...