Question

How were the elements in the first periodic table arranged?

Answer 1

Based on atomic mass

Explanation:

Elements were arranged on the first periodic table based on their atomic masses.

The mass of an atom is made up of the mass of the nucleus which contains the protons and neutrons.

• Dimitri Mendeleev was the first person credited for arranging elements periodically.
• He was said to have been inspired while playing his game of solitaire on a train.
• On his table, he left spaces for the atomic masses of elements not yet discovered.
• Today, the periodic table is based on the atomic numbers of elements. This is the number of protons in an atom.

Learn more:

Periodic table brainly.com/question/2690837

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