Which of the following is an example of pseudoscience? A. Radiometric dating B. Electromagnetism C. Horoscopes D. Biology

In saturated organic compounds, all the bonds between carbon atoms are called?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

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!