## Homework Problem 2.55

Lily Guo 1D
Posts: 64
Joined: Fri Sep 29, 2017 7:03 am

### Homework Problem 2.55

When the textbook refers to "Group 5 Transition Metals", does that mean Group 5 where Group 1 is the alkali metals? Or does it mean Group 5 where Group 1 is the first column of transition metals (Sc, Y, etc.)?

Peter Dis1G
Posts: 97
Joined: Fri Sep 29, 2017 7:04 am

### Re: Homework Problem 2.55

From the answer key, it seems like it's referring to Group 5 counting from the transition metals. It says (n-1)d^5 ns^2. I was confused by that at first.

Esin Gumustekin 2J
Posts: 57
Joined: Thu Jul 27, 2017 3:01 am

### Re: Homework Problem 2.55

I believe it is referring to group 5 which contains elements such as V, Nb and Ta. Group 1 should be the alkali metals. I believe there is an error with the answer key and that the correct answer should be (n-1)d^3 ns^2.

Navleen Bajwa 3A
Posts: 20
Joined: Fri Sep 29, 2017 7:06 am

### Re: Homework Problem 2.55

I think the question is referring to the actual group 5 with transition elements such as V, Nb, Ta, and Db. In that case, the answer should be ns^2 (n-1)d^3. But the answer key says that ns^2 (n-1)d^5. Either the answer key is incorrect, or the question is actually referring to group 5 starting from the d block. However, I think the answer key put the wrong answer.

clairedisc3b
Posts: 20
Joined: Fri Sep 29, 2017 7:07 am

### Re: Homework Problem 2.55

I also do not understand why for the group 15 elements, there is no (n-1)d^10 but is just ns^2np^3

ramayyala1G
Posts: 31
Joined: Fri Feb 02, 2018 3:02 am

### Re: Homework Problem 2.55

Navleen Bajwa 3A wrote:I think the question is referring to the actual group 5 with transition elements such as V, Nb, Ta, and Db. In that case, the answer should be ns^2 (n-1)d^3. But the answer key says that ns^2 (n-1)d^5. Either the answer key is incorrect, or the question is actually referring to group 5 starting from the d block. However, I think the answer key put the wrong answer.

I think it is only (n-1)d^5 because the question words it as group 5 of the transition metals, not group 5 of the whole periodic table meaning that the group 5 of the whole periodic table is actually group 3 of the transition metals meaning that if we use the group 5 of the transition metals, then the problem is referring to Mn,Tc, Re, and Bh. If it wanted the whole periodic table it would word it just group 5 elements, not group 5 transition metals. But the question it self should make it clearer rather than leaving this up for interpretation.