An atom of element x having atomic number 11 combines with an atom of element y having atomic number 9 to form compound write the formula of the compound and state types of bond formed compound ?

The compound formed by the combination of an atom of element x (atomic number 11) and an atom of element y (atomic number 9) would be a compound of sodium (Na) and fluorine (F).

The formula of the compound would be NaF.

The bond formed between sodium and fluorine is an ionic bond, where sodium donates an electron to fluorine to achieve a stable electron configuration. Sodium becomes positively charged (Na+) and fluorine becomes negatively charged (F-) resulting in the formation of an ionic compound.