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Ch8Atoms/PeriodTable
8th grade science, periodic table, atoms
| Question | Answer |
|---|---|
| negatively charged particle that orbits, moves around, the nucleus | electron |
| substance that has only one type of atom | element |
| the center of an atom | nucleus |
| positively charged particle, found in the nucleus | proton |
| a particle with no charge, found in the nucleus | neutron |
| the number of protons (and electrons) in an atom | atomic number |
| the number of protons and neutrons in an atom | atomic mass |
| space where electrons are found | shell |
| a horizontal row in the periodic table (running from side to side) | period |
| a vertical column in the periodic table (running from top to bottom) | group |
| shiny, good conductors of electricity and thermal energy | metal |
| most reactive family of metals | alkali metals |
| group 1 of the periodic table | alkali metals |
| the russian chemist who first designed the periodic table | Ditri Mendeleev |
| groups 3-12 of the periodic | transition metals |
| group 18 of the periodic table | noble gases |
| found on the right side of the zig zag line of the periodic table | non-metals |
| semiconductors that act like metal or non-metals sometimes | metalloids |
| found on the left side of the zig zag line of the periodic table | metals |
| chemical properties of elements in the same ____ change in a predictable way as you move from one end to the other | period |
| elements in a _____ have similar properties | group |
| elements in the same period in the Periodic Table have the same number of | shells |