If an atom contains 4 protons, 5 neutrons, and 4 electrons, its mass number is?

"acknowledging a right to benefit from the presence of animals requires government action to ensure human access to animals in a number of different spheres," writes jessica pierce, ph.d., in psychology today. the pragmatic meaning of the term "right" in this statement is

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

The many volcanoes located along the edge of the pacific ocean make up the ring of fire. how does subduction play a role in the volcanic activity in the ring of fire?