All SAT II Chemistry Resources
Example Questions
Example Question #3 : Sat Subject Test In Chemistry
An atom of phosphorus has 15 protons, 16 neutrons, and 15 electrons. What is the atom's mass number?
Possible Answers:
Correct answer:
Explanation:
Protons and neutrons both have masses of approximately 1 amu, whereas the mass of an electron is negligible. Therefore, the mass number is equal to the number of protons and neutrons, which is 31.
All SAT II Chemistry Resources
Popular Subjects
SSAT Tutors in Phoenix, Math Tutors in Philadelphia, Reading Tutors in New York City, SAT Tutors in San Diego, LSAT Tutors in Dallas Fort Worth, Biology Tutors in Philadelphia, LSAT Tutors in San Francisco-Bay Area, Algebra Tutors in Chicago, English Tutors in New York City, ISEE Tutors in San Francisco-Bay Area
Popular Courses & Classes
GMAT Courses & Classes in Chicago, SAT Courses & Classes in Houston, GRE Courses & Classes in Miami, LSAT Courses & Classes in Los Angeles, GRE Courses & Classes in Philadelphia, GRE Courses & Classes in New York City, SSAT Courses & Classes in Houston, ISEE Courses & Classes in Seattle, GRE Courses & Classes in Phoenix, GMAT Courses & Classes in Denver
Popular Test Prep
GMAT Test Prep in Chicago, LSAT Test Prep in Los Angeles, SAT Test Prep in Chicago, GRE Test Prep in Philadelphia, ISEE Test Prep in Dallas Fort Worth, ISEE Test Prep in San Diego, GRE Test Prep in Phoenix, ACT Test Prep in Boston, ISEE Test Prep in Denver, LSAT Test Prep in Boston