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Physics Stuff

Physics Quiz

QuestionAnswer
What do atomic theories explain? Solids, Liquids, and Gasses
What did John Dalton research? Atoms and Molecules
What did Hooke research? The pressure and temperature of gasses as a result of atomic impacts
What did Avogadro find? A constant (6.022 × 10^23) that was the number of atoms in a mole
What did Brown study? The random motion of small objects (pollen grains) suspended in water
What did Thomson discover/study? The electron
What does the word "atom" mean? Uncuttable
What did John Dalton make? The original table of economic weights
What did Becquerel discover? Radioactive atoms
What is the range of wavelengths of visible light in Angstroms? 4000-7000
What is the size of one atom? 1.0*10^-10 meters= 1 Angstrom
What did Thomson do? He studied atoms and electrons using a Cathode Ray tube and magnetic fields
What were the two main models of the atom? The Plum Pudding Model and The Planetary Model
What two main things did Rutherford research? Alpha particle scattering and backwards deflection
What gives the "fingerprint" of an element? An element's atomic spectra
If an element is missing most of the basic colors from the atomic spectra, then what type of spectrum is it? Emission Spectrum
If an element is missing very little of the basic colors from the atomic spectra, then what type of spectrum is it? Absorption Spectrum
What charge does an atom have? No charge (neutral)
What charge does an ion have? (+) or (-)
What charge is the main mass of an atom? (+)
What do "excited" atoms produce (atoms with vibrating electrons)? A unique spectrum of light
What is radiation in an atom caused by? The atom's accelerated charges
What is the problem with the Planetary Model of an atom? The electrons circling the atom are accelerating and spiraling around the atom so fast that they would hit the atom instantly; very unstable
What is the problem with the Plum Pudding Model of an atom? There was no configuration that could be stable
Created by: stonely