What is the name of the element with a calculated value of 56?
CREATE TABLE "atomic_radii" (
  "number" real,
  "symbol" text,
  "name" text,
  "empirical" text,
  "calculated" text,
  "van_der_waals" text,
  "covalent_single_bond" text,
  "covalent_triple_bond" text
);
SELECT "name" FROM "atomic_radii" WHERE "calculated"='56';