True or false the discovery that diseases can be spread in water led to water quality regulation ?

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at

Which of the following is true about the speed of light? it depends on the wavelength.

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals