How many energy levels are in a krypton atom

4

Explanation: Number of Energy Levels:4

First Energy Level:2

Second Energy Level:8

Third Energy Level:18

Fourth Energy Level:8

Hope this helps! :)

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons