In which row are the chemical elements in the order of enhancing their metallic

In which row are the chemical elements in the order of enhancing their metallic properties? 1) Br-Se-K2) Mg-Al-Si3) N-Li-C4) S-Cl-P

Under the metallic properties of simple substances is meant their reductive ability, i.e. the ability to donate electron (s) during chemical interaction. The elements of period 1 with an increase from lithium to france have this ability most clearly.

In periods of the periodic system, the metallic properties weaken with an increase in the serial number. The radius of the atom decreases and the attraction of electrons by the nucleus increases, so it is more and more difficult to “give away” them. As a result, to the 7th group, there is not enough 1 atom to the full complement of electrons at the external level.

Therefore, in the Br-Se-K series, metallic properties are enhanced, while non-metallic properties are weakened.