(Questions 6 and 7) For the following elements list the electron configuration.
Assume it is neutral
and in its ground state.
6. Fluorine
(a) 1s22s22p1
(b) 1s22s22p63s1
(c) 1s22s22p5
(d) 1s22s22p63s23p64s1
(e) 1s22s1
7. Gallium
a)1s22s22p63s23p64s23d104p65s24d105p66s24f1
(b)1s22s22p63s23p64s23d104p65s24d105p66s1
(c) 1s22s22p63s23p64s23d104p1
(d) 1s22s22p63s23p64s23d104p65s24d1
(e) 1s22s22p63s23p64s23d104p65s24d105p1
6. (c) 1s22s22p5
7. (a)1s22s22p63s23p64s23d104p65s24d105p66s24f1
6. Fluorine: (c) 1s22s22p5
7. Gallium: (c) 1s22s22p63s23p64s23d104p1
6. To determine the electron configuration of Fluorine (F), we need to know its atomic number. The atomic number of Fluorine is 9, which means it has 9 electrons.
The electron configuration is written by filling in the electron orbitals in order of increasing energy. The orbitals are represented by a combination of numbers and letters.
Starting with the lowest energy level, the electron configuration of Fluorine can be determined as follows:
- The first energy level (n=1) can hold a maximum of 2 electrons, so we fill it with 1s2.
- The second energy level (n=2) can also hold a maximum of 2 electrons, so we fill it with 2s2.
- The second energy level (n=2) also has a p orbital, which can hold 6 electrons. We place the remaining 5 electrons in the 2p orbital, giving us the electron configuration of 1s22s22p5.
So, the correct answer for the electron configuration of Fluorine is (c) 1s22s22p5.
7. To determine the electron configuration of Gallium (Ga), we need to know its atomic number. The atomic number of Gallium is 31, which means it has 31 electrons.
Similarly, starting with the lowest energy level, the electron configuration of Gallium can be determined as follows:
- The first energy level (n=1) can hold a maximum of 2 electrons, so we fill it with 1s2.
- The second energy level (n=2) can also hold a maximum of 2 electrons, so we fill it with 2s2.
- The second energy level (n=2) also has a p orbital, which can hold 6 electrons. We place the remaining 10 electrons in the 2p orbital, giving us the configuration of 1s22s22p6.
- The third energy level (n=3) can hold a maximum of 2 electrons in the 3s orbital, so we fill it with 3s2.
- The third energy level (n=3) also has a d orbital, which can hold 10 electrons. We place the remaining 9 electrons in the 3d orbital, giving us the configuration of 1s22s22p63s23p64s23d9.
However, in the case of Gallium, the 4s orbital has lower energy than the 3d orbital, so one electron from the 4s orbital is moved to the 3d orbital to achieve a more stable configuration.
Therefore, the correct answer for the electron configuration of Gallium is (d) 1s22s22p63s23p64s23d104p65s24d1.