Atoms of which two elements have a combined total of 23 protons? Boron, B, and carbon, C
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Sodium, Na, and magnesium, Mg
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Copper, Cu, and zinc, Zn
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None of these

the answer is :

looks like the answer is     c     to me!

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the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.