Name the elements from 3rd period.
An element X belongs to 3rd period and group 2 of the periodic table. State :
(a) number of valence electrons (b) valency (c) metal or non-metal (d) name of the element
(a) What is the main characteristic of the last elements in the periods of the periodic table? What is the general name of such elements?
(b) What is the number of elements in (a) 1st period, and (b) 3rd period, of the modern periodic table?
how do 6th period in modern peroidic table has 32 elements?