 |  Radioactivity 30 Flashcards |  Start |
 | The maximum number of electrons that can occupy a shell of number n is given by the formula ___ . |  Card: 1 / 30 |
| 2n^2 | Card: 2 / 30 |
| True or False: The mass of an electron is approximately equal to 1/1840 times the mass of a neutron. | Card: 3 / 30 |
| False. The mass of an electron is approximately 1/1840 times the mass of a proton, not a neutron. | Card: 4 / 30 |
| An atom is electrically neutral because it has an equal number of ___ and ___. | Card: 5 / 30 |
| Protons; electrons | Card: 6 / 30 |
| Riddle: I am found in the center of an atom, made of protons and neutrons, I am very small yet hold great power. What am I? | Card: 7 / 30 |
|  The nucleus | Card: 8 / 30 |
| The size of an atom is typically on the order of ___ meters. | Card: 9 / 30 |
|  10^-10 | Card: 10 / 30 |
| Fill in the blank: The total number of nucleons in the nucleus is called the ___ of the element. | Card: 11 / 30 |
|  Mass number | Card: 12 / 30 |
| What determines the size of an atom? | Card: 13 / 30 |
| The size of an atom is determined by the radius of the shell of its outermost electron. | Card: 14 / 30 |
| Riddle: I am a particle with no charge, yet I am essential to the nucleus. Without me, the atom would be incomplete. What am I? | Card: 15 / 30 |
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| Neutron | Card: 16 / 30 |
| What distinguishes stable isotopes from unstable isotopes? | Card: 17 / 30 |
| Stable isotopes have equal neutrons and protons.
| Card: 18 / 30 |
| Riddle: I am an element's twin, with the same number of protons, but my neutrons differ. What am I? | Card: 19 / 30 |
|  An isotope. | Card: 20 / 30 |
| How many neutrons does deuterium have compared to protium? | Card: 21 / 30 |
|  Deuterium has one neutron, while protium has no neutrons. | Card: 22 / 30 |
| True or False: Hydrogen has three isotopes: protium, deuterium, and tritium. | Card: 23 / 30 |
|  True. | Card: 24 / 30 |
| The number of nucleons in isobars is represented by ___ and their atomic number is represented by ___. | Card: 25 / 30 |
|  A (mass number) and Z (atomic number), respectively. | Card: 26 / 30 |
| What are the three types of radiation emitted during radioactive decay, and how can they be distinguished? | Card: 27 / 30 |
| Three types of radiation are α, β, γ.
| Card: 28 / 30 |
| Fill in the blank: The phenomenon of radioactivity is a ___ phenomenon. | Card: 29 / 30 |
|  Nuclear | Card: 30 / 30 |
| Completed! Keep practicing to master all of them. |  Restart |
