7.An atom of sodium has 11 protons and 13 neutrons. Is it the most abundant isotope of Na? Yes

No

Sorry i dont understand the question can you rephase it?

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

Hi + naoh -> h2o + nal

Zinc contains about 30 protons