Explain how a burning candle demonstrates both physical and chemical changes

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

What is an example of a physical property?

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom