What element is this

Nitrogen (N)

Explanation:

From the question given above, the following data were obtained:

Electronic configuration of the element => 1s² 2s²2p³

Next, we shall determine the number of electrons present in the element.

Thus, the number of electrons in the element can be obtained as follow:

Number of electron = 2 + 2 + 3

Number of electron = 7

Next, we shall determine the number of protons in the element.

Since the element is neutral, the number of protons is the same as the number of electrons. Mathematically,

Number of protons = number of electrons

Number of electron = 7

Therefore,

Number of protons = 7

Finally, we shall determine the atomic number of the element.

The atomic number of an element is the number of protons in the atom of the element. Mathematically,

Atomic number = number of protons

Number of protons = 7

Therefore,

Atomic number = 7

Comparing the atomic number of the element ( i.e 7) with those in the periodic table, the name of the element is Nitrogen (N) since no two elements have the same atomic number.

indium, and thallium have three electrons i think