Boka (Group) apa kureva shongwe dzinodzika kubva kumusoro ichienda zasi paChapotera. Sokuti shongwe inovambira pane Beryllium (Be) kusvika pane Radium (Ra) iboka rechipiri. Boterero regumi rinovambira pane Nickel (Ni) kusvika pane Darmstadtium (Ds) .