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Atoms & PT Review
Early review of atoms and periodic table
| Question | Answer |
|---|---|
| protons | subatomic particle with positive charge |
| neutrons | subatomic particle with neutral (no) charge |
| electrons | subatomic particle with negative charge |
| Mendeleev | made the first periodic table |
| nucleus | where protons and neutrons are found in atom |
| atoms | the building blocks of all matter |
| electron cloud | where electrons are found |
| atomic number | the number of protons |
| atomic mass | the sum of protons and neutrons |
| period | horizontal rows on periodic table |
| group/family | vertical columns on periodic table |
| periodic table | list of all known existing elements |
| s, p , d, f | blocks on the periodic table |
| metals | most of the elements are classified as this (shiny, solids, good conductors of heat and electricity) |
| metalloids | B, Si, As, Te, At, Ge, Sb ;have properties of metals and non-metals |
| 18 | number of groups on the periodic table |
| 7 | number of periods on the periodic table |