The particles in both gases and liquids select one: a. consist only of atoms. b. can change positions with other particles. c. vibrate in fixed positions. d. are packed closely together.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Which type of fossil does this image depict?

Which element is least likely to undergo a chemical reaction