Write the electronic configuration for nickel(#28).

I know it is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^8

(b) How many electrons are there of highest energy in nickel?
Is it 8?

(c) how many electrons are there in the outermost energy level(orbit) of nickel?
Is this 8 also?

Your electron configuration is right.

b) Yes, there are 8 electrons in the highest energy sublevel.

c) For part c I think it would be 10 because when you look at the last orbit, it includes both s-block and d-blocks. So when you include the electrons from 4s^2 and 3d^8, there are 10 electrons.

Hope this helps.

In order to answer this question correctly you need to write the electron configuration as

1s2 2s2 2p6 3s3 3p5 3d8 4s2

c)There are two electrons in the outermost shell. Those are the 4s2 electrons and they are the electrons lost to make Ni^2+ compounds. N = 4 is obviously a "further away" shell than N = 3.

(a) The electronic configuration for nickel (#28) is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^8.

To determine the electronic configuration, you need to follow the Aufbau principle, Hund's rule, and the Pauli exclusion principle. Start filling the orbitals in increasing order of energy levels.

- The first shell (n=1) contains 2 electrons, which fill the 1s orbital: 1s^2.
- The second shell (n=2) contains 8 electrons, which fill the 2s and 2p orbitals: 2s^2 2p^6.
- The third shell (n=3) contains 18 electrons, which fill the 3s and 3p orbitals: 3s^2 3p^6.
- The fourth shell (n=4) contains 10 electrons, which fill the 4s and 3d orbitals: 4s^2 3d^8.

(b) The highest energy level in the electronic configuration of nickel is the 4th shell (n=4). The 4s and 3d orbitals are both part of this level. In nickel, the 4s orbital is filled with 2 electrons, while the 3d orbital is filled with 8 electrons. Therefore, the total number of electrons in the highest energy level of nickel is 2 + 8 = 10, not 8.

(c) The outermost energy level (orbit) refers to the highest value of n in the electronic configuration. In the case of nickel, the outermost energy level is the 4th shell (n=4). The 4s and 3d orbitals are part of this level. The 4s orbital contains 2 electrons, while the 3d orbital contains 8 electrons. Therefore, the total number of electrons in the outermost energy level of nickel is 2 + 8 = 10, not 8.