What are two observations you made from viewing the solar system model?

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

  the mississippians were considered to be  horticulturalists, which means they were

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.