Which pair of atoms are isotopes of each other? a
oxygen-16 and oxygen-18
carbon-14 and nitrogen-14
iodine-131 and iodine-131
e
d
radium-222 and radon-222

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.