Question

What is the main characteristic of the last element in each period of the Periodic Table? What is the general name of such elements?

Answer 1

Hint: The periodic table of elements is a tabular representation of chemical elements organised by atomic number, electron structure, and recurrent chemical properties. The table's composition reveals periodic patterns. Metals are on the left and nonmetals are on the right in the table's seven rows, known as intervals.

Complete answer: The elements in the columns, referred to as groups, have identical chemical activities. The halogens, for example, are classified as group 17 elements, while noble gases are classified as group 18. Four basic rectangular areas or blocks are also seen, each connected with the filling of separate atomic orbitals.
The outermost shells of the last element of the periodic table are entirely filled by either two or eight electrons. Inert gases are the name given to these elements.
The noble gases (Group 18), which are found at the far right of the periodic table, were historically known as "inert gases" because of their filled valence shells (octets), which render them highly non reactive. In comparison to other element types, noble gases were discovered comparatively late.
Since noble gases have a small interatomic energy, their melting and boiling points are extremely low. Under standard conditions, these are all monatomic gases, even those with atomic masses greater than those of certain naturally stable elements.
Under normal conditions, noble gases are colourless, odourless, tasteless, and nonflammable. Except under the most extreme circumstances, noble gases are normally extremely inert. Noble gases' inertness makes them ideal for systems where no reactions are desired. The valence electron shells of noble gases are complete. Valence electrons are an atom's outermost electrons that are therefore the only ones involved in chemical bonding.

Note:
The noble gases (historically known as inert gases; also known as aerogenes) are a group of chemical elements with identical properties; they are all odourless, colourless, monatomic gases of very low chemical reactivity under normal conditions. Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and nuclear radon are the six naturally occurring noble gases (Rn). Oganesson (Og) has been speculated to be a noble gas or to defy the trend due to relativistic effects; however, its composition has yet to be studied.