Question

19 what is the atomic number of the element with the noble - gas notation * (0.5 points) kr5s1 35 38 37 34 36

Explanation:

Step1: Know Kr's atomic number

The atomic number of Kr (krypton) is 36.

Step2: Consider additional electron

The noble - gas notation [Kr]5s1 means after the krypton core, there is 1 additional electron in the 5s orbital.

Step3: Calculate atomic number

The atomic number of the element is 36 + 1=37.

Answer:

37 (corresponds to option C if the options are numbered as C. 37 in the multiple - choice context)