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B3, U3, L1&2
Term | Definition |
---|---|
Atom | The smallest particle into which an element can be divided and still be in the same element |
Electrons | Negatively charged particles |
Nucleus | A small, dense center that has a positive charge and is surrounded by moving electrons |
Protons | Positively charged particles |
Nuetrons | Uncharged particles |
Electron Cloud | An area in which electrons move around the nucleus |
Atomic Number | The number of protons in the nucleus of an atom |
Mass Number | The total number of protons and neutrons in an atom's nucleus |
Periodic Table | A period order of elements in the pattern of smallest to largest protons in an element's atomic number |
Chemical Symbol | An abbreviation for an element's name on the periodic table |
Average Atomic Mass | The weighted average of the masses of all the naturally occurring isotopes of that element |
Metals | Shiny elements that conduct heat and electricity well |
Nonmetals | Poor conductors of heat and electricity |
Metalloids | Elements that have some properties of metals and some properties of nonmetals |
Group | Each vertical column of elements(from top to bottom) on the periodic table |
Period | Each horizontal row of elements(from left to right) on the periodic table |