Question

what is this element? 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

Explanation:

Step1: Calculate the total number of electrons

The electron configuration is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{4}\).
Sum the electrons: \(2 + 2+6 + 2+6 + 2+10 + 4=34\).

Step2: Determine the element based on atomic number

The atomic number \(Z\) (number of electrons in a neutral atom) is \(34\).
Looking at the periodic table, the element with atomic number \(34\) is Selenium.

Answer:

Selenium