If the large hadron collider is 27 km long, and visible light travels 3.0 × 108 m/s, how long does it take a ray of visible light to travel from one end of the collider to the other?

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?

Name the element in group 17, period 2. (periodic table)

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds