Which of the following is NOT true for the atoms ¹²C, ¹³C, and ¹⁴C? A) They all have six electrons. B) They all have the same mass number. C) They all have the same atomic number. D) They are isotopes. E) They all have six protons.

Question

Quizplus · Accepted Answer

The atomic number (the number of protons) is the same for all, indicating they are the same element (carbon, in this case, with 6 protons), which makes options A, C, E, and D true. The mass number (sum of protons and neutrons) varies, indicating they are isotopes with different numbers of neutrons, making option B not true.

Which of the Following Is NOT True for the Atoms