Physics, 05.01.2020 00:31 azertyqwerty123
Which statement is most useful in explaining why chemists assign atoms to chemical elements by counting protons? a. the proton's negative charge holds electrons in the atom. b. the nucleus doesn't change in stable isotopes. c. protons at the atom's surface determine the atom's behavior. d. 99% of the atom's mass consists of protons. e. none of these. elements are defined by the number of protons.
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Adolphin emits ultrasound at 100khz and uses the timing of reflections to determine the position of objects in the water. part a what is the wavelength of this ultrasound? assume that temperature of water is 20 degrees c. answer in cm
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Which statement is most useful in explaining why chemists assign atoms to chemical elements by count...
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