19.b is the chemical symbol of which element?
boron
boring
balkite
beryllium
20.zinc (zn) has an atomic number of 30 and an atomic mass of 65. how many neutrons does a stable atom of zn have?
30
35
60
95

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.