Question

Complete the following...

Mendeleev_____ atomic masses of some elements, so as to give them proper positions in the periodic table in accordance with their_____
He corrected the atomic mass of______ from 14.09 to_______​

Answer 1

Answer:

Dmitri Mendeleev in 1897, public domain

Organizing Matter

In the mid-1700s, chemists began actively identifying elements, which are substances made up of just one kind of atom. But a century later, they still used a variety of symbols and acronyms to represent the different materials — there just wasn’t a common lexicon. In 1869, the Russian chemist Dmitri Mendeleev came to prominence with his tabular diagram of known elements. This basic ingredient list, of which all matter exists, became known as the periodic table. Here’s what’s especially amazing: Mendeleev’s chart allotted spaces for elements that were yet to be discovered. For some of these missing pieces, he predicted what their atomic masses and other chemical properties would be. When scientists later discovered the elements Mendeleev expected, the world got a glimpse of the brilliance behind the periodic table.

Explanation:

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