Select from the drop-down to correctly complete the statement. In order for a chemical reaction to take place, a certain amount of
Choose...
must be present.

Clouds form when water vapor to form small droplets. a. humidifies b. condenses c. evaporates d. precipitates

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Which compound contain an iron with a 3+ charge