Question

What should be the atomic number of the next halogen if discovered in the future?
A. 115
B. 117
C. 119
D. 121

Answer 1

Fluorine (atomic symbol F), chlorine (Cl), bromine (Br), iodine (I), and astatine (A) are all members of the halogen family of chemical elements (At). Group VIIA of the Periodic Table of Elements is made up of halogens. Halogens are diatomic molecules that make up the elements. The halogens, on the other hand, are never found in nature in their natural state due to their extreme reactivity. From the Greek word salt, halos, and producing genes, the surname means "salt-forming." The halogen salts (halides) sodium chloride (NaCl) and potassium iodide contribute significantly to the salinity of Earth's seas (KI).

Complete answer:
Elements with atomic numbers larger than 103 are frequently mentioned in scientific literature, but they don't get names until they're 'found.' The Commission on Nomenclature of Inorganic Chemistry was requested to give suggestions on the names and symbols of the heavy 'unknown' elements for indexing and other reasons. The Commission agreed that these aspects should be called in a systematic manner and that the names should adhere to certain guidelines.
(I) The names should be brief and clearly connected to the elements' atomic numbers.
(ii) Whether the element was anticipated to be a metal or not, the names should finish in 'ium.'
(iii) The sequentially designated elements' symbols should be made up of three letters.
(iv) As far as feasible, the symbols should be generated directly from the atomic numbers and visually connected to the names.
The following halogen will have an outer structure of$7{s^2}7{p^5}$. Because the filling of 7p-orbitals will commence after the filling of 5f and 6d-orbitals, the new halogen's atomic number will be 112 (up to the filling of 6d-orbitals) plus 5, or 117. (Ununseptium Uus)

So, the correct answer is “Option B”.

Note:
At normal temperature and pressure, the halogens are the only periodic table group that contains elements in three of the major states of matter. When halogens are linked to hydrogen, they all produce acids. The majority of halogens are produced from minerals or salts. Chlorine, bromine, and iodine, the middle halogens, are frequently employed as disinfectants. The most common type of flame retardant is organic bromides, but elemental halogens are hazardous and can be fatal.