Published by:
CGP EDU Academic Team
Published on: August 14, 2026
What is the atomic number of last member of the seventh period of the extended form of periodic table?
Text Solution
Verified by ExpertsThe correct answer is:
B
the las member of the sixth period is radon. its atomic number is 86. In the seventh period energy shells 7s, 5f, 6d and 7p are completed , i.e. 2 + 14 + 10 + 6 = 32 electrons are to be accommodated. Thus,in the 7th period, 32 elements will be present. So, the atomic number of the last member will be 86 + 32 = 118.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The outer electron configuration of Gd (Atomic No : 64) is :
Which one of the following orders presents the correct sequence of the increasing basic nature of t…
Which is correct match ?
Which of the following statements is not correct regarding hydrogen :
Atomic number of Ag is 47. In the same group, the atomic numbers of elements placed above and below…
Which represents alkali metals (i.e. 1st group metals) based on (IE)1 and (IE)2 values (in kJ/mol) …