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S8P1.f
reaconginze that there are more than 100 elements and some have similar
Term | Definition |
---|---|
periodic table | able of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns. |
period | a horizontal row of elements in the periodic table |
group | a vertical column of elements in the periodic table , |
valence electrons | lectron in one of the outer shells of an atom that can participate in forming chemical bonds with other atoms |
reactivity | the state or power of being reactive or the degree to which a thing is reactive. the extent to which a nuclear reactor deviates from a steady state. |
metalloid | an element whose properties are intermediate between those of metals and solid nonmetals. |
inert | unable to react chemically under normal circumstances |