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As you explore the elements, look carefully at the model of each atom in the lower
right corner of the element's picture. What is one way the atoms differ from one
another?

A. They are not all particles of matter.

B. They are different shapes.

C. They are different sizes,

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PFChangs

Answer:

They are different sizes.

Explanation:

Because electrons are what take up space in atoms, the result is that the size of the biggest filled orbital determines the size of the atom or ion. As you go down the periodic table, usually atoms get bigger because n gets bigger (there are electrons in higher shells).