How many protons, neutrons, and electrons are present in an atom of aluminum-27?

Which best describes why nh4+ can form an ionic bond with ci-?

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?

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.