level: Level 1
Questions and Answers List
level questions: Level 1
| Question | Answer |
|---|---|
| electrons do not have a fixed orbit. the path of the electron cannot be predicted | what were schrodinger, heinsenberg, and all other 20th century scientists known for? |
| electrons rotate about an atoms nucleus | what was bohr known for? |
| described the atom as having a central positive nucleus surrounded by negative orbiting electrons. | what was rutherford known for? |
| discovered that small particles exist inside an atom.negatively charged particles in every atom | what was J.J thompson known for? |
| found that all atoms given element are exactly alike. different elements differ by atomic weight. | what was dalton known for? |
| quarks | protons and neutrons are made up of smaller particles called.. |
| no net charge | if an atom is not combined, it has.. |
| atomic mass unit | what does amu stand for? |
| 1 nanometer | the average diameter of an atom is about.. |
| cloud & orbitals | the nucleus is surrounded by an area known as a "..." where electrons constantly spin around the nucleus. electrons are found in certain areas called.. |
| nucleus | the central, dense, part of the atom is called the .... |
| mass | the nucleus takes up almost of the atoms... |
| positive | the nucleus has an overall "..." charge |
| electron cloud model | the model of the atom accepted by the scientific community today is called the... |