9. Which is most likely responsible for the planets' predictable patterns of movement in the solar system?
A. solar eclipses
B. Earth spinning on its axis
c. the sun's gravitational pull
D. the moon's gravitational pull

c. the sun's gravitational pull

Explanation:

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nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

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