A piece of white paper was coated with silver bromide and exposed to the light. Sections of thepaper were covered as shown in the diagram. Predict the appearance of the different sections of the paper after exposure to the light and theremoval of the card. Explain your predictions. I need this answer , I have an exam ​

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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the answer is learned

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.