Which of the following is the BEST evidence of a chemical change? A) Two liquids forming layers instead of mixing.

B) Two liquids mixing to blend their colors.

C) Two liquids mixing to produce a precipitate.

D) Two solids forming a mixture.

The answer for #3 is c but i don't know why

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Which factor is likely to impact the possible number of compounds ?