Which best describes the relative positions of protons, neutrons, and electrons in an atom? a) protons and neutrons are in the center of the atom, and electrons move around in the cloud. b) electrons form a cloud that has protons and neutrons sprinkled throughout. c) neutrons are in a center of the atom, and protons and electrons move around them in a cloud. d) protons and electrons are held together by neutrons in the center of the atom

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?