The compound formed between sodium and selenium is named "sodium selenide" and has the formula Na2Se.
Na2Se. Please see the link.
No binary compound between beryllium and sodium.
A formula for a compound formed between sodium cations and sulfate anions is Na2SO4.
This compound doesn't exist.
Sodium and fluorine will form an ionic compound named sodium fluoride with the formula NaF.
Sodium selenide is a compound formed between sodium and selenium.
Na2Se. Please see the link.
Na2Se
No binary compound between beryllium and sodium.
A formula for a compound formed between sodium cations and sulfate anions is Na2SO4.
This compound doesn't exist.
Sodium and fluorine will form an ionic compound named sodium fluoride with the formula NaF.
na3S
The compound sodium bromide is formed by the formation of ionic bonds between sodium and bromide ions.
NaCl.
The sodium ion is Na+ and the oxide ion is O2-. Therefore the ionic compound formed between the two ions has chemical formula Na2O which is sodium oxide.
Table salt is a compound formed by reaction between sodium and chlorine.