What are the atomic numbers of last elements of $^{'} d^{'}$ block and $p$ block of incomplete period assuming that the period is completed?

111, 86

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80, 86

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112, 118

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111, 117

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Solution

The correct option is B $112, 118$
The last element of incomplete period of 'd' block comes below mercury. Atomic number of mercury is 80. The element should have atomic number $80 + 32 = 112$ , there will be $6$ elements in $^{'} p^{'}$ block and the last element of $p$ block should have atomic number $112 + 6 = 118$ .

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Similar questions

Q. Atomic numbers of last elements of 'd' block and 'p' block of incomplete period assuming that the period is completed.

(i) Comprehension given below is followed by some multiple choice questions. Each question has one correct option. Choose the correct option. In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz s, p, d, and f.
The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. In accordance with the Aufbau 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 lanthanoids and actionoids are placed at the bottom of the main body of hte periodic table
The element with atomic number 57 belongs to
(a) s- block ( b) p-block (c) d- block (d) f- block

(ii) The last element of the p - block in 6th period is represented by the outermost electronic configuration.
(a) $7 s^{2} 7 p^{6}$ (b) $5 f^{14} 6 d^{10} 7 s^{2} 7 p^{0}$
(c) $4 f^{14} 5 d^{10} 6 s^{2} 6 p^{6}$ (d) $4 f^{14} 5 d^{10} 6 s^{2} 6 p^{4}$

(iii) Which of the elements whose atomic numbers are given below, cannot be accommodated in the present set up of the long frm of the periodic table?
(a) 107 (b) 118 (c) 126 (d) 102

(iv) The electronic configuration of the element which is just above the element with atomic number 43 in the same group is .....
(a) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{2}$
(b) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{5} 4 s^{3} 4 p^{6}$
(c) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{6} 4 s^{2}$
(d) $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{7} 4 s^{2}$

(v) The elements with atomic numbers 35, 53 and 85 are all ..
(a) noble gases (b) halogens (c) heavy metals (d) light metals

Q. If the seventh period is completed, the atomic number of the last element would be:

Q. What is the group number, period and block of the element with atomic number

40

Q. The atomic number of an element 'X' is

16

. In the modern periodic table the element 'X' belongs to this block and period.

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What are the atomic numbers of last elements of ′d′ block and p block of incomplete period assuming that the period is completed?

The correct option is B 112,118The last element of incomplete period of 'd' block comes below mercury. Atomic number of mercury is 80. The element should have atomic number 80+32=112, there will be 6 elements in ′p′ block and the last element of p block should have atomic number 112+6=118.

What are the atomic numbers of last elements of $^{'} d^{'}$ block and $p$ block of incomplete period assuming that the period is completed?