Periodic Classification of Elements
Who proposed the Law of Triads?
According to Newlands' Law of Octaves, the properties of the eighth element are similar to those of the:
Mendeleev's periodic table was based on which fundamental property of elements?
Who discovered the modern periodic law based on atomic number?
How many groups are present in the Modern Periodic Table?
Which of the following elements belongs to the alkali metals group?
What happens to atomic radius as we move from left to right across a period?
What happens to the metallic character of elements as we go down a group?
Which of the following is a noble gas?
Elements that exhibit properties of both metals and non-metals are called:
What is the valency of an element with atomic number 12?
Which of the following atoms has the largest atomic radius?
Mendeleev left gaps in his periodic table for elements that were not discovered at that time. Which of the following was one such element?
Elements in the same group of the periodic table have the same:
Which of the following sets of elements is written in order of increasing metallic character?
What is the formula of the oxide formed by an element X belonging to Group 2?
Which of the following is not a halogen?
An element has an electronic configuration of 2, 8, 7. To which group and period does it belong?
Which scientist arranged elements in the increasing order of atomic masses and found that every eighth element had properties similar to the first?
Who proposed the Law of Triads for the classification of elements?
According to Newlands' Law of Octaves, the properties of every how many elements are similar to the first element?
What is the basis of the Modern Periodic Table?
Which of the following elements has the maximum metallic character?
What happens to the atomic radius as we move from left to right across a period in the Modern Periodic Table?
Which of the following elements has the maximum atomic radius?