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unit 1
atomic struture
Term | Definition |
---|---|
atom p.507 | the smallest piece of matter that still retains the property of of the element. |
atomic number p.513 | number of protons in an atom's nucleus |
average atomic mass p.515 | the weighted-average mass of the mixture of it's isotopes |
electrons p.507 | particles with an electrical charge of 1- |
electron cloud p.511 | the area around the nucleus of an atom where it's electrons are most likely found. |
electron dot gram p.522 | the symbol of the elements and dots to represent the electrons in the outer energy level |
group p.520 | the vertical columns in a periodic table |
isotope p.514 | atoms of the same element that have different numbers of neutrons. |
mass number p.513 | the sum of number of protons and the number of neutrons in the nucleus of an atom |
neutrons p.507 | neutral particles that do not have an electrical charge |
nucleus p.507 | the positively charged center of a nucleus |
period p.523 | the horizontal rows of elements on the periodic table |
periodic table p.516 | elements arranged by increasing atomic number and by changes in physical and chemical properties |
protons p.507 | particles with an electrical charge of 1+ |
quark p.507 | small particles that make up protons and nuetrons |