2. which one about atom is WRONG? a. Atomic number is the number of protons in nucleus b. Mass number is the sum of number of protons + number of neutrons c. Mass number is the sum of atomic number + number of neutrons d. one element can't have more than one type of atom
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Atomic number is the number of protons in nucleus - This is correct. b. Mass number is the sum of number of protons + number of neutrons - This is also correct. Show more…
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Which of the following statements about the mass number of an atom is incorrect? It has a unit defined as a dalton. b. $\quad$ On Earth, it equals the atomic weight. c. Unlike the atomic weight of an atom, it does not change when gravitational forces change. d. It equals the number of electrons in an atom. e. $\quad$ It is the sum of the protons and neutrons in the atomic nucleus.
Which one of the following statements about atoms and subatomic particles is correct? An atomic nucleus contains equal numbers of protons and neutrons. A neutral atom contains equal numbers of protons and electrons. The proton and the neutron have negligible masses. The electron is the heaviest subatomic particle.
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The atomic number tells you the a. number of neutrons in the nucleus. b. number of protons in the atom. c. atomic mass of the atom. d. number of its electrons if the atom is neutral. e. Both b and d are correct.
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