What IONS are present in MgCO₃ (magnesium carbonate)? Mark all that apply.

A Mg+
B C⁴-
C O2-
D Mg²+
E C⁴+
F CO₃²-

Y=‐1x + 7 if y has a value of ‐24 what is the value of x?

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?