Identify the equations that show ionization. Check all that apply.
NaCl(s) → Nat(ag)+Cl(aq)
HCl(g)+H2O() → H30+ (aq) +Cr (aq)
O2(g) → 02(aq)
CO2(g)+2H20(I) →HCO3(aq) +H30* (aq)
CaCl2(s) → Ca2+ (aq) + 2Cr (aq)

Why are the trends and exceptions to the trends in ionization energy observed?

Express the following number in scientific notation. 0.026890 =

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.