Genesis of Periodic Classification

Henry Moseley studied characteristic $\mathrm{X}$-ray spectra of elements. The graph which represents his observation correctly is
Given $\mathrm{v}=$ Frequency of X-ray emitted
         $\mathrm{Z}=$ Atomic number

What were the new elements discovered after Mendleeev arranged his periodic table?

Describe Moseley's experiment.

Why the Mendeleev's periodic table was better than Meyer's table?

The experiment which led to the modern periodic law was:

Write any one limitation of Mandelevee's periodic table.

Which of the following element is unknown at the time Mendeleev published his Periodic Table?

Compare the Lothar Meyer's periodic arrangement with the Moseley's experiment.

Express the experiment carried out by Moseley.

Express the law of octaves.

Discuss the limitations of octave rule.

The atomic masses of $\mathrm{L}\mathrm{i}$ and $\mathrm{K}$ are $7$ and $\mathrm{39,}$ respectively. According to law of triads the atomic mass of $\mathrm{N}\mathrm{a}$ will be

Mendeleev left the gap under aluminium and a gap under silicon having atomic weights $68$ and $72$ respectively. These elements respectively are 

In Mendeleev's periodic table, iodine with lower atomic weight than that of tellurium was placed along with 

Which of the following statements is incorrect?

Which of the following statements is incorrect?

Dissimilar elements have been placed in the same group in the Mendeleev's periodic table ? Comment.

What is the demerit of Mendeleev's periodic table with respect to the arrangement of elements ?

Some similar elements like copper and mercury are separated in Mendeleev's periodic table. Explain ?

In Mendeleev's periodic table, gaps were left for the element to be discovered later on. Which of the following elements found a place on the periodic table later on?