... atomic weights • Carbon, atomic number 6, has two isotopes, C-12 and C-14, with atomic weights shown by their numbers • U-235, U-238, and U-239 are three isotopes of uranium [isotopic adj.] QUICK ... lever and a fulcrum to rest it on, he could move the world • Probably the lever most adult Americans are familiar with today is in voting machines and is used to open and close the curtain [-ed, -ing, ... persons, groups, companies, and so on • The Taft-Hartley Act calls for strikers to return to work for an 80-day cooling-down period, while mediators try to broker a settlement between workers and...