The bonds in the compound mgso4 can be described as
a. ionic, only
b. covalent, only
c. both ionic and covalent
d. neither ionic nor covalent

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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.

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .