Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_10 (sodium VARCHAR, lithium VARCHAR, rubidium VARCHAR)
### Question:
what is the properties of sodium when lithium is h a l o g e n s and rubidium is nacl (2.1)?
### Answer:
SELECT sodium FROM table_name_10 WHERE lithium = "h a l o g e n s" AND rubidium = "nacl (2.1)"