Why does the 6th period of periodic table have the max number of elements even though the 7th period has 32 elements as well?
Answers
n the periodic table each period begins with the filling of principal quantum number (n). The value ofnfor the sixth period is 6. Forn= 6, azimuthal quantum number (l) can have values of 0, 1, 2, 3, 4.
In the 6thperiod, electrons can be filled in only 6s, 4f, 5d,and 6psubshells. Now, 6shas one orbital, 4fhas seven orbitals, 5dhas five orbitals, and 6phas three orbitals. Therefore, there are a total of sixteen (1 + 7 + 5 + 3 = 16) orbitals available. According to Pauli’s exclusion principle, each orbital can accommodate a maximum of 2 electrons. Thus, 16 orbitals can accommodate a maximum of 32 electrons.
Hence, the sixth period of the periodic table should have 32 elements
a) A noble gas-H,P
Noble gases are neon, Argon
b)A halogen-GO
Halogns are flourine, chlorine
c)An alkali metal-A,I
Alkali metals are lithium and sodium
d)An element with valency 4-D,L
Element with tetravalency are carbon and silicon.