Phenolphthalein solution is used as an indicator of acids and bases. if added to an ammonia-based solution of window cleaner, we would expect the solution to turn a) blue. b) brown. c) pink. d) yellow.

b. atoms in metallic solids are not arranged in a regular pattern

explanation:

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).