Newton's first law of motion means that it will take a force to start and stop an object in motion.

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?

What are the 4 phases of matter in order of increasing engery content?

Drug abuse will not lead to physical and psychological dependence. true or false ?