Answer:
C. A Covalent Bond
Explanation:
two covalent bond form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell
Thermal conductivity is the ability of a material to conduct heat.
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<span>The Doppler effect is the change in frequency or wavelength of a wave for an observer who is moving relative to the wave source. It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842</span>