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ChemistryChemistry
3 May, 14:13

An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the best conclusion that can be drawn?

The atom has 7 neutrons and 8 protons.

The atom has 7 electrons and 8 protons.

The atom has 8 neutrons and 7 electrons.

The atom has 8 electrons and 7 protons.

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Answers (2)
  1. 3 May, 14:50
    0
    The correct answer is the atom has 7 neutrons and 8 protons.
  2. 3 May, 15:47
    0
    Remember that a positively charged particle is the proton. So the atom has 8 protons, which narrows down the options to A and B. The atomic mass is equivalent to the number of protons and neutrons in the nucleus. So 15 - 8 = 7. So there are 7 neutrons, Which means the answer is A.
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Home » Chemistry » An atomic physicist determines that an atom is composed of 8 positively charged particles and has a mass of 15 amu. Which is the best conclusion that can be drawn? The atom has 7 neutrons and 8 protons. The atom has 7 electrons and 8 protons.
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