An atom has no electrical charge because
the number of protons is equal to the number of neutrons
the number of neutrons is equal to the number of electrons
the number of protons is equal to the number of electrons
all of the above

Idon’t understand this page, can someone ?

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.

How does concentration affect reaction rate