Chapter 8 Terms

reactions involving the particles in an atom’s nucleus

the atomic nuclei of unstable isotopes that release fast-moving particles and energy

2 protons and 2 neutrons

particle given off by an atom’s nucleus during radioactive decay

high energy waves like x-rays

time needed for half the atoms in a sample to decay

using half-lives to determine a fossil’s age

Radioactive isotopes that can be followed throughout the steps of a chemical reaction

Using radioactive elements to destroy unhealthy cells

particles and energy produced during radioactive decay

Thread-like piece of glass used to transmit light

A common natural composite made of long cellulose fibers

substituting this for limestone creates a glass that bends light

Synthetic polymers that can be molded or shaped

combine 2+ substances w/ different properties to make a new substance

Strands of glass fibers woven together and strengthened with liquid plastic

making an alloy by firing a beam of ions at a metal

an alloy of carbon, nickel, iron, and chromium

its properties depend on which elements are added to iron