Which conditions suggest that a bond will be covalent? O A. Atoms are from the metal and nonmetal groups.
O B. Atoms are both from the nonmetal groups.
C. The difference in electronegativity between the two atoms is
below 0.4.
D. The difference in electronegativity between the two atoms is
above 1.7.

Which formula can be used to calculate the molar mass of hydrogen peroxide

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!

If a sample of radioactive isotopes takes 600 minutes to decay from 400 grams to 50 grams, what is the half-life of the isotope?