Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9.

1. was mendeleev suggestion correct?

2.how had he reached to this conclusion?

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Solution

Yes , Mendeleev suggestion was correct . Because First we have taken hydrogen as the standard to find the masses of different elements but it didn't give us the correct value of masses of different elements . Then we have taken oxygen as our standard then we face the same problem . At last we have taken 12 isotope of carbon a our standard By This we get the correct value of masses of different elements.

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Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9. 1. was mendeleev suggestion correct? 2.how had he reached to this conclusion?

Initially it was believed that atomic mass of beryllium was 13. but mendeleev suggested that its atomic mass should be 9.

1. was mendeleev suggestion correct?

2.how had he reached to this conclusion?