The nucleus is:
a. the center of an atom
c. specified by mass number
b. specified by atomic number
d. all of the above

How many moles are in 123.0 grams of kclo4?

What is the most common reason for matter changing its state?

Which would freeze at a higher temperature: the great salt lake or lake tahoe? a. lake tahoe would freeze at a higher temperature. b. the great salt lake would freeze at a higher temperature. c. both lakes would freeze at the same temperature.