A sample of sodium-24 chloride containing 0.15 milligrams of sodium-24 is injected into an animal to study sodium balance. How much sodium-24 remains 6.0 hours later? The half-life of sodium-24 is 14.96 hours.

Order the following from smallest to largest atom, electron, quark, proton, neutron, molecule, nucleus

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

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?