it is Ionic because radium is a metal and selenium is a nonmetal or radium is on the left of the stair case and selenium is to the right
Rubidium selenide has the formula Rb2Se.
This compound is not ionic compound because the absolute difference in electronegativity between its both elements is less than 1.8. in ionic compounds the electronegativity difference should be more than 1.8 on pauling scale.
Covalent
Barium Selenide.
Aluminum selenide=============
Radium oxide has never been characterised. As radium is group 2 metal with chemistry like barium, radium oxide is expected to be ionic.
Rubidium selenide has the formula Rb2Se.
This compound is not ionic compound because the absolute difference in electronegativity between its both elements is less than 1.8. in ionic compounds the electronegativity difference should be more than 1.8 on pauling scale.
Covalent
Aluminum selenide=============
Barium Selenide.
The systematic name of this ionic compound is Tin(IV) Selenide.
This is an ionic compound.
ionic
Ionic
It is ionic
Is CsL ionic or covalent