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

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

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17