Which is mismatched regarding the position of the element as given below?
(1) X(Z=89) - f block,\(6^{th}\) period "
(2) Y(Z=100)- f block,\(7^{th}\) period
(3) A(Z=115)- d block,\(7^{ th}\) period
(4) Both (1)&(3)

Write the electronic configuration of the elements given below and also predict the block, group number and period to which they belong. ( Z= Atomic number) I. A(Z=5) , B(Z=11) , c(Z=28) , D(Z=54) , E(Z=59) , F(Z=90) .

Which block of the periodic table contains the element with configuration 1s^2 2s^2 2p^6 3s^2 3p^6 3d^(10) 4s^1

The fourteen elements collectively placed in group 3^(rd) ( or IIIB) and 7^(th) period are called:

If f:R rarr R is a function satisfying the property f(x+1)+f(x+3)=2 for all x in R than fis (1) periodic with period 3(2) periodic with period 4(3) non periodic (4) periodic with period 5

An element has electronic configuration [Xe] 4f^(7), 5d^(1),6s^(2) . It belongs to ____ block of this periodic table.

If 3e^(-) can be accomodated in each orbital then how many elements will be present in the 7th period of periodic table?

In the modern period table, elements are arranged in order of increasing atomic number which is related to the electric configuration. Depending upon the type of orbitals receving the last electron, the elements in the periodic table have been diviced into four blocks viz s,p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period being with the filling of a new energy shell. In according with the Aufbua principle, the seven periods (1 to 7) have 2,8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanodis and actionoids are placed at the bottom of the main body of the periodic table. The last element of p-block in 6th period is represented by the outermost electronic configuration.