Answer
See the explanation
Work Step by Step
a. Cu, Cu+, Cu2+:
The order of decreasing size is:
Cu > Cu+ > Cu2+
Explanation:
- Copper (Cu) is a neutral atom, and it has the largest size.
- Copper(I) ion (Cu+) has one less electron than the neutral atom, resulting in a smaller size.
- Copper(II) ion (Cu2+) has two less electrons than the neutral atom, resulting in the smallest size.
b. Ni2+, Pd2+, Pt2+:
The order of decreasing size is:
Pt2+> Pd2+> Ni2+
c. O, O-, O2-:
The order of decreasing size is:
O2- > O- > O
Explanation:
- Oxide ion (O2-) has the largest size.
- Superoxide ion (O-) has a smaller size than O2-.
- Oxygen atom (O) has the smallest size.
d. La3+, Eu3+, Gd3+, Yb3+:
The order of decreasing size is:
La3+ > Eu3+ > Gd3+ > Yb3+
Explanation:
- Lanthanum(III) ion (La3+) has the largest size.
- Europium(III) ion (Eu3+) has a smaller size than La3+.
- Gadolinium(III) ion (Gd3+) has a smaller size than Eu3+.
- Ytterbium(III) ion (Yb3+) has the smallest size.
e. Te2-, I-, Cs+, Ba2+, La3+:
The order of decreasing size is:
Te2-> I->Cs+ > Ba2+ > La3+
