The silicon needles on new blood analyzing devices can painlessly collect samples of blood with volumes of about 100 nanoliters. how many samples of this size would fit in a conventional 5 ml hypodermic needle?

Light waves travel than sound waves.

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.

What does a numerical subscript following an element in a chemical formula mean?