How did the position of `frac(35)(17)Cl` and `frac(37)(17)Cl`get fixed in the Modern periodic table?

How many groups are there in the modern periodic table?

Answer the following questions: How did the position of get fixed the modern periodic table?

How many groups are present in modern periodic table

Write a short note on: Position of isotpes in the Mendeleev's and the Modern periodic table

How is the problem regarding the position of cobalt("_59CO) and nickel ("_NI) in Mendeleev's periodic table resolved in Modern periodic table ?

Answer the following questions: What do you think? Should hydrogen be placed in the group 17of halogens or group 1 of alkali metals in the modern periodic table?

How many horizontal rows and vertical columns are present in modern periodic table?

What should be the position of Hydrogen in the Modern periodic Table?Why?

In the modern periodic table, the elements are arranged in the increasing order of their atomic number. This arrangement is based on the modern periodic law, which states that the properties of elements are a periodic function of their atomic numbers. In the modern periodic table, each column is called a group and each row is called a period. Elements within the same group show similarity and gradation in properties. This is due to the same number of electroms in the outermost shell . Based on the above paragraph, answer the following question: How many groups are there in the modern periodic table?

Mendeleev predicted the existence of certain elements not know at that time. He named two of these elements as eka-aluminium and eka-silicon. a. Name the elements which have taken the place of these elements. b. Mention the group and period of these elements in the modern periodic table. c. Which one of these two elements is a metalloid? d. How many valence electrons are present in eka-silicon? e. Eka-aluminium forms a chloride. What is its formula?