An object has a mass of 7.5kg is then raised to a height of 3m. what is the velocity of object the moment it hits the ground?

The electron configuration for chromium is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 5 4 s 1 instead of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 4 4 s 1 . the configuration is an exception to the

Nonmetal halogen family atmoic mass 35

What is the maximum number of electrons that an atomic orbital can contain?