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CHEM 141 EXAM 2 MSU QUESTIONS WITH CORRECT ANSWERS

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CHEM 141 EXAM 2 MSU QUESTIONS WITH CORRECT ANSWERS

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Apply Coulomb's law to explain periodic trends in atomic radii and ionization energies


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The higher the charge the stronger it will be, the distance will also be
shorter




Describe and explain the evidence that supports the Big Bang Theory

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Scientists are observing stars and how they act. Our star is just the same in
the way that nuclear fusion is taking place and making the elements for the
current level that it is at.




Compare and contrast absorption, emission, and the photoelectric effect. Describe
the role that photons and electrons play in each phenomenon.


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Absorption and emission can be seen as when the photons are taken in or
released back into the system, the photoelectric effect shows the electrons
being ejected by the photons.




Explain the force and energy changes that occur when two atoms approach each
other and form a bond. Explain why a third body (another atom or molecule) is
(almost always) needed to form a stable bond. (Think back to what we learned in
Chapter 1.)


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According to Coulumbs law, as the r value being distance, gets smaller the
force will be greater, likewise with the charges of the atoms involved in the
system. To add more energy or to take away energy from a system, other
molecules must be introduced and collide with the interacting atoms to
either transfer more energy or accept energy.




Differentiate between properties of atoms, nano-particles, and larger macroscale
materials. Explain why is it that atoms don't have macroscopic

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