Sodium selenide is a compound formed between sodium and selenium.
Na2Se
The compound sodium bromide is formed by the formation of ionic bonds between sodium and bromide ions.
NaCl.
Table salt is a compound formed by reaction between sodium and chlorine.
Na2s
The compound formed between sodium and selenium is named "sodium selenide" and has the formula Na2Se.
Na2Se
The formula would be K2Se
No binary compound between beryllium and sodium.
This compound doesn't exist.
Sodium and fluorine will form an ionic compound named sodium fluoride with the formula NaF.
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.
Na2s
Sodium and chlorine react each other to form sodium chloride, NaCl, which is an ionic compound.