Question

Explain Mendeleev periodic table​

Answer 1

Answer:

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Answer 2

Mandeleev periodic table:

▪It was arranged by the Russian chemist Dmitri Mendeleev in 1896.. 

▪It was arranged according to the atomic masses and the properties of the elements..

▪It had gaps for the missing elements because on those times there were only 63 elements founded..

▪It has 8 vertical column known as groups..

▪It has 12 horizontal rows known as periods..

▪It has some elements with dissimilar properties in the same group itself..

▪It doesn't support the fact of the existence of isotopes..