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13 Cards in this Set

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  • Back

What is the SI prefix of "one hundredth" (10 -z)

Centi

How many meters are in 1km?

1000

What subatomic particles have the smallest mass?

Electron

What is the relative charge of an electron.

-1

Which experiment led to the discovery of the nucleus and the development of the planetary (nuclear) model of the atom?

gold foil experiment

What are three subatomic articles found in the nucleus of an atom.

Protons, Nutrons, Nucleons

What identifies an atom as a given element?

Number of protons in the nucleous

What is an isotope?

Atoms that have the same number of protons, but a different number of nuetrons

The unit "u" is used to measure what?

Atomic Mass Units

Instrument used to determine the relative masses of atoms.

Mass Spectrometer

What is kinetic energy?

Energy possessed by matter due to its motion.

What adjective describes a chemical reaction in which the products have more potential energy than the reactants (heat is absorbed; products are cooler)

Endothermic

What is the most abundant element in the universe?

Hydrogen