Compared to an atom of phosphorus-31, an atom of sulfur-32 contains
(1) one less neutron (3) one more neutron
(2) one less proton (4) one more proton

Answer;

(2) one less proton

Explanation;

-Sulfur-32 is an isotope of sulfur that contains 16 protons, 16 electrons and 16 neutrons. Since the mass number is the sum of protons and neutrons then its mass number is 32.

-On the other hand, phosphorus-31 which is an isotope of phosphorus, contains 16 neutrons, 15 protons and 15 electrons, thus its mass number is 31.

-Therefore; Phosphorus has 1 less proton and electron than sulfur in this case because the number of protons are equal to the number of electrons in the element.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.