Select the correct answer. Which unit is used for measuring atomic mass?

AMU-aka
Atomic mass unit

Numbers with a end value of 4 or lower are rounded up, while with an end value of 5 or higher are rounded down. true or false?

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.