The periodic table _____. 1. is arranged by atomic mass 2. is arranged by number of protons 3. was developed by early alchemists 4. is divided into vertical periods and horizontal groups

The periodic table _____.

1. is arranged by atomic mass
2. is arranged by number of protons
3. was developed by early alchemists
4. is divided into vertical periods and horizontal groups

2 Answers

The periodic table _____. 1. is arranged by atomic mass 2. is arranged by number of protons 3. was developed by early alchemists 4. is divided into vertical periods and horizont…

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