Which of the following is a reasonable ground-state electron configuration? 1s22s22p63s23p64s24d4 1s21p62s22p3 1s22s22p63s23p64s23d1 1s22s22p43s2

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?

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false