Pl help me Write electronic configuratof sodium and chlorine in the term of subshell ?

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 change to the system wood cause the freely-moving piston to lower?

Which of the following is not true about the atomic model of substances?