1). Electromagnetic radiation in order of increasing energy and decreasing wavelength.
Ans: Radiowave, Microwave, Infrared, Visible, Ultraviolet, X-ray, Gamma ray
2). Blackbody radiation
Ans: Hot things glow
3). Photoelectric effect
Ans: Light causes metal to emit electrons
4). Emission spectra
Ans: Electronically excited atoms emit light.
5). Bohr's hypothesis
Ans: Electrons exist in fixed orbits around the nucleus and move with specific and
known energies (Only works for hydrogen)
6). Heisenberg uncertainty principle
Ans: It is impossible to know exactly both the velocity and the position of a particle at
the same time; the uncertainty of where a particle is is larger than the particle itself.
7). Quantum numbers
Ans: Principal Number (n): energy level [1,2,3..n]
Secondary Number (l): orbital shape [0..n-1]
Magnetic Number (ml): orbit orientation [0..+-l]
Spin Number (ms): spin [+-1/2]
Ex: 3p^4
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, possible quantum numbers:
n=3
l = 0,1,2
ml = +-0,1,2
ms = +-1/2
8). Intermolecular forces
Ans: Attractions between oppositely charged dipole charges.
9). Strongest to weakest imfs
Ans: ion-dipole
hydrogen bond
dipole-dipole
london dispersion
10). If a molecule is non-polar (london dispersion forces), why is there still attraction between its
atoms?
Ans: Even though there is no permanent dipole, there are still partial dipoles that form,
resulting in weaker bonds.
11). T/f, the larger the compound, the greater the polarizability.
Ans: TRUE
12). Comparing imf strengths between molecules of same/similar size.
13). Comparing imf strengths between molecules of different sizes.
Ans: Consider london dispersion forces; larger molecules have stronger IMFs.
14). Viscosity
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