click below
click below
Normal Size Small Size show me how
Chem Periodic Tab
Talbert Periodic Table
| Question | Answer |
|---|---|
| Periodic Table | horizontal rows and vertical columns of elements losted om order atomic number |
| Element | Simple substance that cannot be broken down into simpler substances |
| Chemical symbol | shorthand way of writing the names of elements |
| Family - Periodic Table | aka as group - Vertical column of elements in periodic table - have similar physical and chemical properties |
| Period - Periodic Table | Horizontal rows on periodic table - elements in rows have the same number of electon shells or orbits |
| Metals | Make up most of the periodic table -Properties solids at room temperature, shiny (luster), can be shaped (malleable), is ductile (made into wire), conductors |
| Non Metals | Make up right side of periodic table - Properties- dull, easily broken (brittle, poor conductors, at room temp can be solid, liquid or gas |
| Inert Gases | aka Noble gases - Family 18 - These gases are all inactive and do not react with other elements |
| Atom | smallest part of an element that can be identified - has t3 parts protons, electrons, neutrons |
| Proton | in nucleus of atom - has positive charge |
| Neutron | in nucleus of atom - has no charge (neutral) |
| Electron | outside nucleus of atom (in electron cloud/orbit) - is negative in charge - very light weight and always moving |
| Atomic Number | = to number of protons and to number of electrons - different elements have different numbers of protons, |
| Atomic Mass | protons plus neutrons = Total mass of atom - always round this number before using |
| Valence electron | Number of electrons in the outermost (outside) energy shell - is same as the family/group number |