Atomic and Molecular Structure

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Can you name the Atomic and Molecular Structure

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a horizontal row of elements in the periodic table
the sum of numbers of protons and neutrons in the nucleus of an atom
a vertical row of elements in the periodic table
a subatomic particle that has no charge and is found in the nucleus of an atom
an atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons
a unit of mass that describes the mass of an atom or molecule; it is exact
an element that is shiny and conduct heat and electricity well
a charged particle
HintAnswer
the weighted average of the masses of all naturally occurring isotopes of an element
the number of protons in the nucleus of an atom
an atom's central region
a subatomic particle that has a positive chage and that is found in the nucleus of an atom
a subatomic partcle that has a negative charge and is found outside the nucleus of an atom
states that the repeating chemical and physical properties of elements changes periodically with the atomic numbers of the elements
an element that is not shiny and does not conduct heat and electricity well

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