Chemistry
Chemistry, 26.10.2021 08:50, 4300402428

The periodic table . a. is arranged by atomic mass
b. was developed by early alchemists
c. is arranged by the number of protons
d. is divided into vertical periods and horizontal groups

It's either a or c I'm pretty sure but i don't know which one

answer
Answers: 1

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Do you know the correct answer?
The periodic table . a. is arranged by atomic mass
b. was developed by early alchemists
...

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