Question

what element has the configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³ br sc se as

Explanation:

Step1: Calculate the total number of electrons

The sum of the exponents in the electron configuration gives the number of electrons.
$$2 + 2+6 + 2+6 + 2+10 + 3=33$$

Step2: Relate the number of electrons to the atomic number

In a neutral atom, the number of electrons is equal to the atomic number. So the atomic number \(Z = 33\).

Step3: Identify the element

Looking at the periodic table, the element with atomic number \(33\) is Arsenic (\(As\)).

Answer:

As