Yes. By definition. A normal distribution has a bell-shaped density curve described by its mean and standard deviation. The density curve is symmetrical(i.e., an exact reflection of form on opposite sides of a dividing line), and centered about (divided by) its mean, with its spread (width) determined by its standard deviation. Additionally, the mean, median, and mode of the distribution are equal and located at the peak (i.e., height of the curve).
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No. The binomial distribution (discrete) or uniform distribution (discrete or continuous) are symmetrical but they are not normal. There are others.
It is symmetrical
It is not necessary that all symetric distribution may be normal.
It is a symmetrical, "bell-shaped" curve. The tails are infinitely long.
You call it a bell shaped curved. It may or may not be Gaussian (Normal).