MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Groups and Periods (Mendeleev's)

What were the...

Question

What were the criteria used by Mendeleev in creating his period. Why do you think the noble gases are placed in a separate group?

Open in App

Solution

Mendeleev used the relationship between the atomic masses and their physical and chemical properties and give the law that the properties of elements are the periodic functions of their atomic masses.

Noble gases are placed in separate groups because they are ultimately unreactive and do not combines with any other element in the periodic table.

Suggest Corrections

thumbs-up

4

Similar questions

Why do you think the noble gases are placed in a separate group?

What were the criteria used by Mendeleev in creating his Periodic Table?

Q. (a) Why do we classify elements?
(b) What were the two criteria used by Mendeleev in creating his Periodic Table?
(c) Why did Mendeleev leave some gaps in his Periodic Table?
(d) In Mendeleev's Periodic Table, why was there no mention of Noble gases such as Helium, Neon and Argon?
(e) Would you place the two isotopes of chlorine, Cl-35 and Cl-37 in different slots because of their different atomic masses or in the same slot because their chemical properties are the same? Justify your answer.

Q. Mendeleev created the 'zero group' only to fit the noble gases which were discovered towards the end of 19th century.

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Early Models of Periodic Table

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Groups and Periods (Mendeleev's)

Standard IX Chemistry

Join BYJU'S Learning Program

CrossIcon