Question

अक्टूबर
असाइनमेंट-2
कक्षा दसवी
विषय - विज्ञान
Hin
पूर्णाक-20
देश-दिए गए अभ्यास प्रश्नों को निर्देशानुसार हल कीजिए :-
astruction:- Please attempt the questions as per given instructions.
न 1 मेण्डलीफ की आवर्त सारणी एवं मोसले की आधुनिक आवर्त सारणी में तत्वों
की व्यवस्था की तुलना कीजिए। (कोई पाँच)
अंक 15 शब्दसीमा 100-150
1 Compare and contrast the arrangements of elements in
Mendleev's periodic table and Mosley's modern periodic
table. (any five)​

Answer 1

Answer:

here is ur answer buddy I hope that's helpful please mark as brainest answer

Mendeleev's periodic table

1. Elements were arranged in increasing order of atomic masses.

2. There are 8 groups.

3. Each group is divided into subgroups a and b.

4. The group for noble gases was not present, as noble gases were not discovered at that time.

5. There was no place for isotopes.

Modern periodic table

1. Elements are arranged in increasing order of atomic numbers.

2. There are 18 groups.

3. Groups are not divided into subgroups.

4. A separate group, i.e. group 18 is present for noble gases.

5. This problem was rectified, as slots are determined on the basis of atomic number.