Question

This is how krypton appears in the periodic table. Rounded to the nearest whole number, how many protons are in an atom of krypton? 36 48 84 120

Answer 1

36 is the answer hope it helps

Answer 2

Answer is: 36.

Krypton is a chemical element with symbol Kr and atomic number 36.

Krypton has 36 protons and 36 electrons. It is noble gas (group 18).

Noble gases are in group 18: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn). They have very low chemical reactivity.

Electron configuration of krypton atom:  

₃₆Kr 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶.