Answer:
Na+ is positively charged as it loses an electron
Cl- is negatively charged as it gains an electron
It's where chemical elements are organized based on atomic weight. Also, like/similar physical and chemical properties in each interval of 7 elements.
It was a silly reason it was rejected. It was rejected because it's octaves were too similar to those in music.
I hope this helps!
The answer is D. A compound
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