Fill in the blanks. people can identify the of an element by looking at its on the periodic table

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

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.

Enzymes affect the reactions in living cells by changing the