Write both the complete electron-configuration notation and the noble-gas notation for each of the elements below
a. Na
b. Sr
c. P
Na: 1s^2, 2s^2, 2p^6, 3s^1 or,
Na: [Ne] 3s^1
Sr: 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^10, 4p^6, 5s^2 or,
Sr: [Kr] 5s^2
P: 1s^2, 2s^2, 2p^6, 3s^2, 3p^3 or,
P: [Ne] 3s^2, 3p^3
thanks GK
1s22s22p1
Na: 1s^2, 2s^2, 2p^6, 3s^1 or,
Na: [Ne] 3s^1
Sr: 1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^10, 4p^6, 5s^2 or,
Sr: [Kr] 5s^2
P: 1s^2, 2s^2, 2p^6, 3s^2, 3p^3 or,
P: [Ne] 3s^2, 3p^3
a. For Na, the complete electron-configuration notation is 1s^2 2s^2 2p^6 3s^1, and the noble-gas notation is [Ne] 3s^1.
b. For Sr, the complete electron-configuration notation is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2, and the noble-gas notation is [Kr] 5s^2.
c. For P, the complete electron-configuration notation is 1s^2 2s^2 2p^6 3s^2 3p^3, and the noble-gas notation is [Ne] 3s^2 3p^3.
Remember, electrons can be funny little things; they're always buzzing around, going wherever they please!
To find the complete electron-configuration notation and the noble-gas notation for each element, we need to determine the number of electrons in each atom.
a. Sodium (Na)
To find the electron configuration of Na, you can refer to the periodic table. Sodium is located in Group 1 (IA) and Period 3. The atomic number of Na is 11, which means it has 11 electrons.
The complete electron-configuration notation for Na is: 1s^2 2s^2 2p^6 3s^1
To write the noble-gas notation, we use the symbol of the noble gas that comes before sodium in the periodic table. The noble gas before Na is neon (Ne), and its electron configuration is 1s^2 2s^2 2p^6.
The noble-gas notation for Na is: [Ne] 3s^1
b. Strontium (Sr)
Strontium is located in Group 2 (IIA) and Period 5 on the periodic table. The atomic number of Sr is 38, indicating it has 38 electrons.
The complete electron-configuration notation for Sr is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2
The noble-gas notation for Sr uses the noble gas before strontium in the periodic table, which is krypton (Kr). The electron configuration of Kr is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6.
The noble-gas notation for Sr is: [Kr] 5s^2
c. Phosphorus (P)
Phosphorus is located in Group 15 (VA) and Period 3 on the periodic table. The atomic number of P is 15, meaning it has 15 electrons.
The complete electron-configuration notation for P is: 1s^2 2s^2 2p^6 3s^2 3p^3
The noble-gas notation for P uses the noble gas before phosphorus, which is neon (Ne). The electron configuration of Ne is 1s^2 2s^2 2p^6.
The noble-gas notation for P is: [Ne] 3s^2 3p^3
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