Which of these elements is a transition metal? francium (fr) beryllium (be) chromium (cr) gallium (ga) bismuth (bi)

Compare and contrast the bohr model and the electron cloud models of the atom.

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction