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17 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Electron |
Subatomic particle w the smallest negative charge and usually found in the orbital of an atom |
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Proton |
Subatomic particle w smallest possible positive charge; found in the nucleus |
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Neutron |
Neutral subatomic particle found in the nucleus |
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Nucleus |
Positively charged center of an atom containing protons and neutrons |
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Isotope |
Atoms of the same element w the same number of protons, but w a different number of neutrons |
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Atomic weight |
Weighted average of the masses of stable isotopes of an element compared to carbon 12. |
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Solar system theory |
Theory of electrons moving in orbits around the nucleus |
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Problems w solar system theory |
A. Electrons would continue to accelerate B. The particles would emit radiation and lose energy C. Loss of energy would pull electrons into the nucleus and it would collapse |
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Photon |
Light that consists of separate units of energy |
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Plancks constant |
Describes relationship between frequency of light and the energy of individual photons. |
Higher the frequency of the light, the higher the energy of photons |
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Bohr model |
1. Electrons can only move in allowed orbits 2 electrons do not emit energy when the remain in orbit 3. Electrons move from one orbit to another only when they gain or lose energy |
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Quantum concept |
Idea that matter gives off and absorbs energy in separate units called quanta |
Particle theory |
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Halogens |
Very reactive non metals (chlorine) |
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Alkali metals |
Soft metals that react w water to form an alkaline solution |
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Semiconductors |
Can behave like metals, non metals, or both |
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Noble gases |
Gases that have orbitals that are completely filled, so that they don't form compounds |
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Electron dot notation |
Process of writing the chemical symbol w dots around it to represent the number of outer orbital electrons |
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