WAEC - Chemistry (2022 - No. 41)
The atom with the electron configuration
1s\(^{2}\)2s\(^{2}\)2p63s\(^{2}\)3p\(^{6}\)3d\(^{10}\)4s\(^{2}\)4p\(^{4}\) is in
1s\(^{2}\)2s\(^{2}\)2p63s\(^{2}\)3p\(^{6}\)3d\(^{10}\)4s\(^{2}\)4p\(^{4}\) is in
period 4, p- block
period 3, p- block
period 4, d- block
period 3, d- block
Spiegazione
Selenium is a chemical element with the symbol Se and atomic number 34. It is a non-metal