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...
The modern periodic table consists of 7 horizontal periods and 16 vertical groups (18 vertical columns). The elements of the modern periodic table are classified into 4 blocks (s, p, d, and f).
The atomic radius is used as a measure for the atomic size of the atom, and its measuring unit is picometre (Pm), The picometre is part from million of million part of metre.
