Question

Demerits of mendeleves periodic table

Answer 1

Answer:

Following are the demerits of mendeleev's periodic table:

1. No fixed position was given to Hydrogen according to its properties.

2. Isomers were not present in table and no explanation was given for their non existence.

Answer 2

Answer:

Explanation:1. HE COULD NOT PLACE HYDROGEN CORRECTLY AS IT HAS SIMILAR PROPERTIES WITH BOTH ALKALI METALS AS WELL AS NON METALS

2. ISOTOPES WERE DISCOVERED MUCH LATER AFTER THE CREATION OF THE PERIODIC TABLE. SINCE HE HAD ARRANGED THE ELEMENTS IN INCREASING ORDER OF ATOMIC MASS HE GOT CONFUSED WHETHER TO KEEP THE ISOTOPES IN THE SAME SLOT OR DIFFERENT SLOTS.

3. SINCE HE HAD ARRANGED THE ELEMENTS IN INCREASING ORDER OF ATOMIC MASS IT WAS DIFFICULT TO PREDICT THAT HOW MANY ELEMENTS CAN BE DISCOVERED BETWEEN THE TWO ELEMENTS BECAUSE ATOMIC MASS INCREASES RANDOMLY.