An irrelgular object with a mass of 118g displaces 25ml of water when placed in a graduated cylinder. what is the density

How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom

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 fact represents evidence for the big bang theory?