In which period and group is the element whose electron configuration is [Kr]5#s^1#? Chemistry Electron Configuration Electron Configuration 1 Answer MAT Nov 18, 2015 Rubidium (Rb) Explanation: In #5s^1# 5 indicates no of period and #s^1# indicates 1st A group. Answer link Related questions How do electron configurations in the same group compare? How do the electron configurations of transition metals differ from those of other elements? How do electron configurations affect properties and trends of a compound? What is the electron configuration for a sodium ion? What is the electron configuration for a nitride ion? What is the electron configuration of chromium? What is the electron configuration of copper? What is Hund's Rule? What is the ground state electron configuration of the element germanium? What are some examples of electron configurations? See all questions in Electron Configuration Impact of this question 6012 views around the world You can reuse this answer Creative Commons License