SOMEONE HELP ME ASAP PLEASE While in empty space, an astronaut throws a ball at a velocity of 9 m/s. What will the velocity of the ball be after it has traveled 2 meters?
Group of answer choices

A. 9 m/s

B. 7 m/s

C. 0 m/s

D. 11 m/s

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explanation:

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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.