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CEM 141 Exam 3 Practice. Questions And Answers Rated A+ New Update Assured Satisfaction
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CEM 141 Exam 3 Practice. Questions And Answers Rated A+ New Update Assured Satisfaction
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CEM 141 Exam 3 Practice"1s" and "2p" orbitals hydridize to give 3 "sp2" orbitals - ANS-Bonding in Graphite
"Hold on to their electrons" tightly because the electrons are more strongly attracted to the
nucleus - ANS-Atoms with a high ENC
(Valence electrons on free atom) - (# of bonds to atom) - (Non bonded electrons) - ANS-Formal
Charge
A measure of the tendency of an atom to attract a bonding pair of electrons (INCREASES
across & DECREASES as you go down) - ANS-Electronegativity
Ability to make into different shapes - ANS-Malleable
Adding 2 nuclei together (as 2 nuclei move toward each other the PE increases because its a
repulsive force between 2 positive charged particles) - ANS-Nuclear fusion
Allow for rotation around the bond - ANS-Sigma bonds
Always form a 2+ ion - ANS-Transition metals
Because there is an exact amount of energy to send an electron out an atom, means they exist
in discrete energy levels - ANS-Why are ionization energies evidence for the quantization of
energy levels in atoms?
Breaking apart - ANS-Nuclear fission
Can draw out into wires - ANS-Ductile
Close to the nucleus - ANS-Core
Conducts electricity b/c it has delocalized pi MO's over the whole structure, shiny b/c it can
absorb & emit photons, and slippery b/c sheets can slide over eachother - ANS-Graphite
Properties
Contain a metal and a nonmetal (ex: NaCl) & Metals form Cations (+) but Nonmetals form
Anions (-) - ANS-Simple Ionic Compounds
Dont allow for rotation around the bond - ANS-Pi bonds
Electrons are transferred - ANS-Ionic interaction
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