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Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little