Question

question 4 (2 points)
which of the following elements forms an ion with a predictable charge?
au
ti
al
mo

Explanation:

• Au (Gold): It is a transition metal and can form ions with different charges such as \(Au^{+}\) and \(Au^{3+}\).
• Ti (Titanium): It is also a transition metal and can have multiple oxidation states like \(Ti^{2+}\), \(Ti^{3+}\), \(Ti^{4+}\).
• Al (Aluminum): It is a metal in group 13 of the periodic table. Aluminum has a predictable charge of \(+ 3\) when it forms an ion (\(Al^{3+}\)) as it loses three valence electrons to achieve a stable electron configuration.
• Mo (Molybdenum): It is a transition metal and can form ions with various charges such as \(Mo^{2+}\), \(Mo^{3+}\), \(Mo^{4+}\), \(Mo^{5+}\), \(Mo^{6+}\).

Answer:

Al