Question

What is the Features of Mandleev's Periodic Table Maximum Five Points. ​

Answer 1

1. The vertical column in the periodic table are called periods
2. There are eight groups in Roman numeral 1,2,3,4,5,6,7,8 .the elements in the first seven groups divided into two groups A and B according to their similar properties .The eighth group consist of 9 elements arranged in the triads
3. There are 6 period in order to make more element periods 6th,5th and 7th periods are divided into two halves
4. Gaps were left for the elements that were not known at that time.

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Answer 2

Answer:

Features of Mendeelev periodic table:

1) Properties of elements are the periodic function of their atomic mass.

2) At the time of Mendeelev, 56 elements are known to the scientific world.

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