In the compound Al2O3, the ratio of aluminum to oxygen is?

2:3

Explanation:

The compound whose chemical formula is given in the question is called Aluminium oxide. It is structurally made up of two atoms of aluminum (Al) and three atoms of oxygen (O).

Based on the above, the atomic ratio of aluminum to oxygen can be calculated as 2:3 i.e. 2 atoms of aluminum to 3 atoms of oxygen.

hope this !

explanation:

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."