If a carbon atom is bonded to two hydrogen atoms and two carbon atoms, what type of bond must exist between the carbon atoms single double triple quadruple

If a carbon atom is bonded to two hydrogen atoms and two carbon atoms, the type of bond that must exist between carbon atoms is a single bond. Single bonded carbon atoms are called sigma bonds.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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