An atom has an atomic number of 19 and mass number of 39 how many electrons and protons does it have? ​

Which of the following mining methods disrupts the sea floor?

Gymnast always perform on padded mats. how does the mats protect the gymnast

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.