Question

which element has the ground state electron configuration kr5s²4d¹⁰5p³? answer: a te b pb c sb d bi

Explanation:

The electron - configuration [Kr]5s²4d¹⁰5p³ indicates that the element has the electron - configuration of krypton plus 2 electrons in the 5s orbital, 10 electrons in the 4d orbital, and 3 electrons in the 5p orbital. Krypton has 36 electrons. Adding 2 + 10+3 = 15 more electrons gives a total of 36 + 15=51 electrons. The atomic number of an element is equal to the number of electrons in its neutral state. Antimony (Sb) has an atomic number of 51.

Answer:

C. Sb