Explain what is happening on the atomic level (electrons, energy levels) when barium and nitrogen bond. Be sure to discuss the formation of the ions and provide an illustration with your explanation.

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

Which statement describes james chadwick’s discovery.

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils. the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.