J. J. Thomson’s experiments with cathode ray tubes led him to propose a refined atomic model. Using what you can recall from this unit, write one or two short paragraphs describing Thomson’s atomic model. If needed, search the Internet for descriptions of the model.

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory