Elements in atmosphere in pure form
Which group of elements is normally obtained from the atmosphere in pure form?
a) sulfur, phosphorus, oxygen, nitrogen
b) magnesium, sodium, calcium, strontium
c) flourine, chlorine, neon, argon
d) flourine, chlorine, oxygen, nitrogen
e) oxygen, nitrogen, neon, argon
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Which group of elements is normally obtained from the atmosphere in pure form?
a) sulfur, phosphorus, oxygen, nitrogen
b) magnesium, sodium, calcium, strontium
c) flourine, chlorine, neon, argon
d) flourine, chlorine, oxygen, nitrogen
e) oxygen, nitrogen, neon, argon
Answer:
e) oxygen, nitrogen, neon, argon
Oxygen Exists in the atmosphere as free or native gas.
Elemental nitrogen is highly unreactive, largely because of its strong triple bond (almost as inert as the noble gases).
Neon, argon are unreactive because they have completely filled s and p sub-shells.
All these gases can be obtained by the fractional distillation of air.
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