The most stable atoms are those of noble gases such as helium, neon, argon …..etc, Because their outermost energy level is filled with electrons, so, the atoms of these electrons do not undergo any...
The oxygenated acids (acids contain oxygen) and bases are considered as hydroxy compounds, They can be represented by the general formula (MOH), where M is the element atom, The hydroxy compounds can be ionized...
The modern periodic table consists of 7 periods (horizontal rows), and 18 groups (vertical columns), The elements are arranged ascendingly according to their atomic numbers and the way to fill their atomic energy sublevels...
Metals can be classified according to their chemical activity into three groups which are very active metals, less active metals, and inactive metals. The high reactivity of active metals makes them useful in a...
