Name the first and last element in period 2 of the modern periodic table.
Period 2 contains lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon.
So, first element is Lithium and last element is neon in second period.
(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?
Name the first and the last elements of period 2 of the periodic table.
Name the metals among the first ten elements in the modern periodic table.
Name the following:
How many elements are there in the first period in the modern periodic table?