i. Write the electronic conifigurations of the following ions:
a. `H^(Θ)`, b. `Na^(o+)`, c. `O^(2-)`, d. `F^(Θ)`
ii. What are the atomic numbers of elements whose outermost electrons are represented by
a. `3s^(1)`, b. `2p^(3)`, c. `3p^(5)`?
iii. Which atoms are indicated by the following configurations?
a. `[He]2s^(1)`, b. `[Ne]3s^(2) 3p^(3)`, c. `[Ar]4s^(2) 3d^(1)`

Explanation

i. a. `H^(Θ)=1s^(2)`
b. `Na^(o+)=1s^(2)2s^(2)2p^(6)`
c. `O^(2-)=1s^(2)2s^(2)2p^(6)`
d. `F^(Θ)=1s^(2)2s^(2)2p^(6)`
ii. a. `3s^(1)=11(1s^(2)2s^(2)2p^(6)3s^(1))`
b. `2p^(3)=7(1s^(2)2s^(2)2p^(3))`
c. `3d^(6)=26(1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(6)4s^(2))`
iii. a. `[He]2s^(1)=Li` (atomic number `2+1=3)`
b. `[Ne]3s^(2)3p^(3)=P` (atomic number `=10+2+3=15)`
c. `[Ar]4s^(2)3d^(1)= Sc` (atomic number `=18+2+1=21)`