Who was the first to recognize that the observations and experimental results regarding matter could be explained by the existence of atoms?
a. Grookes
b. Rutherford
c. Ballen
d. Chadwick

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If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

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!