Question

write a short note on position of isotopes in the mendleleevs and the modern periodic table​

Answer 1

Answer:

Isotopes are the atoms having same atomic number but different atomic masses. Therefore, according to Mendeleev's classification these should be placed at different places depending upon their atomic masses. For example, hydrogen isotopes with atomic masses 1,2 and 3 should be placed at three places.

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Answer 2

Answer:

position of isotopes in Mendeleev periodic table:

1. isotopes are the atoms of some element having similar chemical property but different atomic masses.

2. isotopes were discovered long time after Mendeleev put forth the periodic table.

3.isotopes have the same chemical properties but different atomic masses , a chemical was posed..in placing them in Mendeleev periodic table.

4. the isotopes were not given separate place in Mendeleev's periodic table.

5.For Ex.the element chlorine has two isotopes Cl-35 and Cl- 37 having atomic masses of 35 and 37 respectively.

6.the placing of these two isotopes of chlorine in the same group of periodic table not be explained by Mendeleev's periodic law .

position of isotopes in modern periodic table:

1. all isotopes of the same element have different masses but same atomic number

2. therefore they occupy the same position in the modern periodic table. for Ex. bodis isotope of chlorine Cl- 35 in Cl- 37 has the same atomic number of 70 so both of them can be put at one place in the same group of the....

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