Question

periodic table
choose the correct chemical symbol to complete the sentence.
the symbol of the element with the electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ is choose .

Explanation:

Step1: Calculate total electrons

Sum the exponents: \(2 + 2 + 6 + 2 + 6 + 10 + 2 + 6 = 38\)? Wait, no, wait: \(1s^2\) (2) + \(2s^2\) (2) + \(2p^6\) (6) + \(3s^2\) (2) + \(3p^6\) (6) + \(3d^{10}\) (10) + \(4s^2\) (2) + \(4p^6\) (6). Wait, 2+2=4, +6=10, +2=12, +6=18, +10=28, +2=30, +6=36. Oh right, 36. So atomic number is 36.

Step2: Identify element with atomic number 36

Element with atomic number 36 is Krypton, symbol Kr.

Answer:

Kr