The loops in Ptolemy’s model, and those shown on the video, are called motion. This phenomenon is caused by Earth’s orbit than those of other planets.

The loops in Ptolemy’s ✔ geocentric model, and those shown on the video, are called

✔ retrograde motion. This phenomenon is caused by Earth’s

✔ faster orbit than those of other planets.

Explanation:

the correct answer is a

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.