valence electron trend on periodic table

Therefore, elements in Group 1 possess a single valence electron, conferring them with a valency of +1, and so forth. Elements in the s and p blocks are grouped according to the number of valence electrons in their outer shell. Conversely, Group 1 houses the alkali metals, a collection of highly reactive elements that engage in vigorous reactions with water. Group 18, for instance, is made up of the noble gases, a set of colorless, odorless, and largely unreactive elements. The modern table hosts 18 groups, with elements within the same group generally sharing similar properties.

The columns of the periodic table are known as groups. Element 115, Moscovium, and element 117, Tennessine, are named after Moscow, Russia, and Tennessee, USA, respectively, in recognition of the scientists and institutions that contributed to their discovery.Element 113, Nihonium, was named by Japanese researchers, as 'Nihon' is the Japanese name for Japan.Elements often derive their names from places or people associated with their discovery: The length of periods in the modern periodic table can vary: the first period comprises only hydrogen and helium, while periods 6 and 7 are extended, necessitating that many of their elements be placed beneath the main body of the table. As we move from left to right across a period, each successive element has one more proton than its predecessor. The rows in the modern periodic table are referred to as periods, echoing the nomenclature used in Mendeleev's original table. Despite these modifications, the fundamental structure of rows and columns, reminiscent of Mendeleev's design, is preserved as it reflects the inherent order of the elements. The modern periodic table, illustrated above, expands upon Mendeleev's original categorisation of 63 elements by arranging the elements according to increasing atomic number rather than atomic mass.

Valence electron trend on periodic table