Question

which of the three element belong to period 3.write their electronic configuration. 3Li, 14Si,2He,15P

Answer 1

si14 and p15 are in third period and

electronic configuration of 14si : 2,8,4

electron ic configuration of 15p : 2,8,5

Answer 2

Silicon and Phosporous belongs to the 3rd period. lithium -2,1. silicon -2,8,4. helium -2 Phosporous-2,8,5.

Number of circles in the electronic configuration as element represented in the periodic table with period number are mainly gained more number of aspects.

Number of electrons in the outermost shell is represented as the periodic table of an element and group number that element is situated in the table.