If atoms of a halogen nonmetal gain one electron, the atoms then have how many valence electrons?

1. list three scientific reasons cockroaches may fly.

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

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.