3 is C i believe, and as for 4 minerals are solid, natural.. that's about all I can say...
Answer:
Even the most powerful light-focusing microscopes can't visualise single atoms. What makes an object visible is the way it deflects visible light waves. Atoms are so much smaller than the wavelength of visible light that the two don't really interact. To put it another way, atoms are invisible to light itself.
Explanation:
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Because Na+ has less electrons than Na which means Na+ will be a smaller atom (give me brainliest please)
Molecules move from areas of high concentration to areas of low concentration.