The total number of neutrons in the nucleus of any atom is equal to the Mass number minus the atomic number, why?

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

Match each statement with the state of matter it describes