The elements in the 18th group in the periodic table, such as helium and neon, are not very reactive because:
A) Their atomic mass is too great to allow them to easily interact with other atoms
B) They have no electrons
C) Their valence shell is full, so there are no free electrons for reaction
D) They have a full d-shell of electrons
E) They are not found on Earth, so don't react well with other elements
Correct Answer:
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