Im probably overlooking something small but im doing the ADA practise test and #63 and #67 for gen chem is giving me some trouble.
#67: What is the number of unpaired electrons in this atom 1s^2 2s^2 2p^6 3s^2 3p^2.
I thought just the 2in the 3p orbital were not paired
but the answer is 3.
#63. In which two compounds does nitrogen have the same oxidation number?
a) N2O3, HNO3
b) N2O5, HNO3
c) NO2, N2O3
d) N2O4, HNO2
e) HNO2, NH3
the answer is B. (i thought O would be -2x5 = -10, and so n2 would be +10 and in HNO3 H is +1, O -2x3=-6 so N is +5???)
Thanks in advance for the help.
#67: What is the number of unpaired electrons in this atom 1s^2 2s^2 2p^6 3s^2 3p^2.
I thought just the 2in the 3p orbital were not paired
but the answer is 3.#63. In which two compounds does nitrogen have the same oxidation number?
a) N2O3, HNO3
b) N2O5, HNO3
c) NO2, N2O3
d) N2O4, HNO2
e) HNO2, NH3
the answer is B. (i thought O would be -2x5 = -10, and so n2 would be +10 and in HNO3 H is +1, O -2x3=-6 so N is +5???)
Thanks in advance for the help.
