Only the two with the smallest atomic numbers, hydrogen and helium. This corresponds to the fact that the innermost shell of electrons can contain only two electrons.
No. Xenon is not the first period of the periodic table. It is placed in the 5th period of periodic table.
No, carbon is not the first element on the periodic table of elements. Hydrogen is the first element on the periodic table.
A row on the periodic table is called a period.
An elements period is its row in the periodic table.
Helium is in the first period of the periodic table.
The first period of the periodic table's elements all have 1 energy level.
There are 2 elements in the first period, 8, 8 elements in 2nd and 3rd periods respectively,
There are 32 elements in the 6th period of the periodic table.
Yes, there were elements on the first periodic table. I believe that there are still elements on the periodic table.
A period on the periodic table is a row.This is the horizontal section of the periodic table.
No. Xenon is not the first period of the periodic table. It is placed in the 5th period of periodic table.
In the Periodic Table of Elements there are: 118 Observed Elements 114 Officially Discovered Elements 112 Officially named Elements 92 Naturally Occuring Elements 83 Non-radioactive elements
An elements period is its row in the Periodic Table.
An elements period is its row in the Periodic Table.
The shell model explains the organization of the periodic table. The elements in the first period have electrons in the first shell; the elements in the second period have electrons in the first two shells; the elements in the third period have electrons in the first three shells; and so on.
There are 8 elements in the third period of periodic table. The elements belong to group-1,2,13,14,15,16,17 and 18
Period 1 refers to the top row of the periodic table. These elements are Hydrogen and Helium.