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42 Cards in this Set
- Front
- Back
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Ancient philosophers regularly performed controlled experiments. True or False? |
False |
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Dalton's atomic theory states that matter is mostly empty space. True or False? |
False |
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Both Democritus and Dalton suggested that matter is made up of atoms. True or False? |
True |
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Dalton's atomic theory stated that atoms of different elements combine in simple whole-number rations to form compounds. True or False? |
True |
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______ proposed the nuclear atomic model. A) Thomson B) Millikan C) Rutherford |
C |
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_____ determined the mass-to-charge ratio of an element. A) Thomson B) Millikan C) Rutherford |
A |
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____ calculated the mass of an electron. A) Thomson B) Millikan C) Rutherford |
B |
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The number of protons in an atom identifies it as an atom of a particular element. True or False? |
True |
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Determine number of protons, neutrons, and electrons. An isotope has atomic number 19 and mass number 39. |
19 protons, 19 electrons, 20 neutrons |
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One atomic mass unit is A) 1/12 the mass of a carbon-12 atom B) 1/16 the mass of an oxygen-16 atom C) exactly the mass of one proton |
A |
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The atomic mass of an atom is usually not a whole number because it accounts fr A) only the relative abundance o the atom's isotopes B) only the mass of each of the atom's isotopes C) both the relative abundance and the mass of each of the atom's isotopes |
C |
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What units is the atomic mass reported in? |
amu (atomic mass units) |
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The rays and particles that are emitted by a radioactive material A) nuclear reaction B) beta radiation C) radiation D) radioactive decay |
C |
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A reaction that involves a change in an atom's nucleus A) nuclear reaction B) beta radiation C) radiation D) radioactive decay |
A |
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The process in which an unstable nucleus lose energy A) nuclear reaction B) beta radiation C) radiation D) radioactive decay |
D |
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Fast moving electrons A) nuclear reaction B) beta radiation C) radiation D) radioactive decay |
B |
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Which plate do the beta particles bend towards? |
They move towards the positive plate because of its negative charge |
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Explain why the gamma rays do not bend |
They have no charge |
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Electromagnetic radiation is a kind of _____ that behaves like a _______ as it travels through space. A) wave, energy B) energy, wave C) frequency, hertz |
B |
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The shortest distance between equivalent points on a continuous wave is called a ______. A) frequency B) wave C) wavelength |
C |
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The height of a wave from the origin to a crest of from the origin to a trough is the _______. A) amplitude B) light C) hertz |
A |
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______ is the number of waves that pass a given point in one second. The SI unit for ______ is _____, which is equivalent to one wave per second. A) Wave, wave, speed B) Frequency, frequency, hertz C) Frequency, wavelength, hertz |
B |
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A ___ is a minimum amount of energy that can be lost or gained by an atom. A) valence electron B) electron C) quantum |
C |
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According to Planck's theory, for a given frequency, v, matter can emit or absorb energy only in A) units of hertz B) whole number multiples of hv C) entire wavelengths |
B |
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The ___ is the phenomenon in which electron are emitted from a metal's surface when light of a certain frequency shines on it A) quantum B) planck concept C) photon effect |
C |
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Which equation would you use to calculate the energy of a photon? A) Ephoton = hv x Planck's constant B) Ephoton = HV C) Ephoton = 1/2hv |
B |
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Like the visible spectrum, an atomic emission spectrum is a continuous range of colors. True or False? |
False |
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Atomic emission spectra can be explained by the wave model of light. True or False? |
False |
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Each element has a unique atomic emission spectrum True or False? |
True |
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The fact that only certain colors appear in an element's atomic emission spectrum indicates that only certain frequencies of light are emitted True or False? |
True |
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The lowest allowable energy state of an atom is called its ______. A) atomic emission spectrum B) ground state C) energy levels |
B |
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According to Bohr's atomic model, the smaller an electron's orbit, the _____ the atom's energy level. A) lower B) higher |
A |
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According to Bohr's atomic model, the large an electron's orbit, the ____ the atom's energy level. A) lower B) higher |
B |
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Bohr's atomic model failed to explain the ________ of elements other than hydrogen.
A) atomic emission spectrum B) ground state C) energy levels |
A |
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If you looked closely, could you see the wavelength of a fast moving car? |
No, the wavelength is too small to be seen |
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The modern model of the atom that treats electrons as wave A) Heisenberg uncertainty principle B) Schrodinger wave equation C) quantum mechanical model of the atom D) atomic orbital |
C |
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States that it is impossible to know both the velocity and the position of a particle at the same time A) Heisenberg uncertainty principle B) Schrodinger wave equation C) quantum mechanical model of the atom D) atomic orbital |
A |
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A 3D region around the nucleus representing the probability of finding an electron A) Heisenberg uncertainty principle B) Schrodinger wave equation C) quantum mechanical model of the atom D) atomic orbital |
D |
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Originally applied to the hydrogen atom, it led to the quantum mechanical model of the atom A) Heisenberg uncertainty principle B) Schrodinger wave equation C) quantum mechanical model of the atom D) atomic orbital |
B |
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How do the Bohr model and the quantum mechanical model of the atom differ in how they describe electrons? |
Bohr's model treats electrons like particles that travel in a specific orbit. Quantum mechanical model treats electrons as waves and don't describe the electron's orbit |
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Electrons in an atom tend to assume the arrangement that gives the atom the _____ possible energy. This arrangement of electrons is the most ____ arrangement and is called the atom's ______________. |
Lowest, stable, ground-state electron configuration |
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The _____ states that each electron occupies the lowest energy orbital available. A) Hurd's rule B) aufbau principle C) Pauli exclusion principle |
B |
