When filling a set of orbitals of equal energy which of the following is true?
A) There are no sets of orbitals of equal energy.
B) Two electrons will occupy the same orbital rather than separate orbitals.
C) Two electrons will occupy different orbitals and have opposing spins.
D) Two electrons will occupy different orbitals and have like spins.
D
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Catastrophic events must have precedents.
Answer the following statement true (T) or false (F)
Sustainable mineral use and longer projected lifetimes for scarce minerals can be achieved with all of the following, except ________
A) finding more available substitutes for scarce minerals B) increasing demand and lowering prices for products using these minerals C) researching more efficient and environmentally friendly techniques of extraction D) exploring for new reserves E) recycling
What process captures steam produced by a factory that makes tennis balls and uses it to heat that factory and possibly other buildings?
What will be an ideal response?
The current estimate of the number of languages spoken across the planet is approximately
A) less than 100. B) between 250 and 1,000 languages. C) between 1,500 and 3,000 languages. D) between 3,500 and 6,500 languages. E) over 7,000.