Why are all bone measurements made in centimeters?

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance

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?

Which of the following describes a situation where competition between producers exists