Which lowest period's element is ruthenium?
CREATE TABLE table_name_28 (period INTEGER, element VARCHAR)
SELECT MIN(period) FROM table_name_28 WHERE element = "ruthenium"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_28 (period INTEGER, element VARCHAR) Question: Which lowest period's element is ruthenium? [/INST] SELECT MIN(period) FROM table_name_28 WHERE element = "ruthenium" </s>