What does the number above the symbol represent?
a. the isotope number
b. the atomic mass
c. the atomic number
d. the ionic number

B.) Above number symbol represents "The Atomic Mass"

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“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .