CREATE TABLE table_204_39 (id DECIMAL, "number" DECIMAL, "symbol" TEXT, "name" TEXT, "21st" DECIMAL, "22nd" DECIMAL, "23rd" DECIMAL, "24th" DECIMAL, "25th" DECIMAL, "26th" DECIMAL, "27th" DECIMAL, "28th" DECIMAL, "29th" DECIMAL, "30th" DECIMAL)

what is the amount of ionization of mo at the 30th ?
SELECT "30th" FROM table_204_39 WHERE "symbol" = 'mo'
SELECT "30th" FROM "table_204_39" WHERE "symbol" = 'mo'