Explain the rate at which objects fall towards Earth both in and out of a vacuum. i have finals this week so if someone could help me with this it would mean the world to me! vacuums are kind of confusing so i could really use some help :D

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Argon, neon, and xenon are examples of