What is an accurate description of the silicon-oxygen tetrahedron?

Which metals are called noble metals

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

What are the coefficients to balance the following equation? ba+br2=babr2