Atomic Structure
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| mass number | the total number of protons and neutrons in the nucleusof the atom
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| atomic mass | the weighted average mass of the atoms in a naturally occuring sample of an element
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| atomic # | the number of protons in the nucleus of an element
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| isotopes | atoms with same numbers of protons but different numbers of neutrons
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| electrons | negatively charged particles
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| atom | the smallest partical of an element that retains the properties of that element
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| nucleus | the central part of the atom, containing protons and neutron
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| neutron | subatomic partical with no charge
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| proton | positively charged subatomic partical
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| atomic emission spectrum | lines of colored light obtained by passing the light emitted by an element through a peism
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| atomic orbital | the region around an atomic nucleus where an electron is likely to be moving
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| spectrum | a range of colors seen when light passes through a prism
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| energy level | probably cloud shape, such as s or p, there is a high probability of finding an electron
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| quantum of energy | the amount of energy required to move an electron level to the next higher one
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| alkali metal | an element in group 1A
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| ionization energy | the energy needed to remove an electron from a gaseous atom
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| period | a horizontal row of the periodic table
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| halogens | the family of nonmetals including fluorine and chlorine
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| electronegativity | the tendency of an atom to attract othe relectrons to itself when it is chemically combined with other another element
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| noble gas | an element in which the outermost s and p sublevels are filled
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| photoelectric effect | a process in which electrons are ejected by metals when light shines on them
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| ground state | the lowest energy level
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| heisenberg's uncertainty princple | it is impossible to know both the volocity and the position of a particle at the same time
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| photon | quantom of light
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Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
nancy johnson
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