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Why did scientists in the 1800s decide that the list of known elements needed to be more

organized?​

User Shekar
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Answer:In the mid-1800's there were only 64 known elements. Scientists then came up with the idea that they could arrange the element by the atomic mass number. Every element has its own unique atomic mass number because elements have different numbers of protons and neutrons.

Step-by-step explanation:

User JFT
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