Can someone please help me with this chemistry study guide I’ll send you the link to it

An observation that requires measurement is called quantitative observable or qualitative

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

Nan element’s square on the periodic table, the number with the greatest numerical value represents the