On which energy level are the valence electrons for calcium (Ca) ?

Drag each tile to the correct box arrange the layers not order from oldest to youngest

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?