Answer:
Cobalt
Step-by-step explanation:
From the question given above, the following data were obtained:
Electronic configuration of element => 1s² 2s²2p⁶ 3s²3p⁶ 4s²3d⁷
Name of the Element =?
Next, we shall determine the number of electrons in the atom of the element. This can be obtained as follow:
Number of electron = 2 + 2 + 6 + 2 + 6 + 2 + 7
Number of electron = 27
Next, we shall determine the number protons in the atom of the element. This can be obtained as follow:
For a ground state element,
Number of Proton = number of Electron
Number of electrons = 27
Number of proton = Number of electron = 27
Number of protons = 27
Therefore, the number of protons in the atom of the element is 27
Next, we shall determine the atomic number of the element. This can be obtained as follow:
The atomic number of an element is simply the number of protons in the atom of the element. Mathematically,
Atomic number = proton number
Number of proton = 27
Finally, we shall determine the name of the element as follow:
Comparing the atomic number of the element (i.e 27) with those in the periodic table, the element is Cobalt since no two elements have the same atomic number.