Examlex
Which group is represented by a ns2np6 valence shell electron configuration?
Focus
A point used in the definitions of conic sections, such as ellipses and hyperbolas, from which distances are measured to define the curves.
Vertex
The point where two lines, or edges, of a geometric figure meet; in the context of a parabola, the peak or the lowest point, depending on its orientation.
Circle
A round plane figure, every point of which is equidistant from a fixed center point, defined by the equation (x-h)^2 + (y-k)^2 = r^2 in a coordinate plane.
Radius
The distance from the center of a circle to any point on its circumference.
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