The electron configuration 1s2 is correct for an element that has 2 electrons, both in the first principle energy level

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

Compare and contrast solutions and suspensions

What is the measured amount of a product obtained from a chemical reaction?