Which element forms a cation?
A. gold
B. phosphorus
C. fluorine
D. nitrogen

Matches the chemical name of each oxide of phosphorus to its chemical formula

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.

If two objects at different te,peraure are in contact with each other what happens to their temperature