the atom u3, l1&l2
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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atom | is the smallest particle into which an element can be divided and still be the same element.
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electron | negatively charged particles.
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nucleus | a small, dense center that has a positive charge and is surrounded by moving electrons.
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proton | positively charged particles in the nucles
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neutron | nucleus contains uncharged particles
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electron cloud | electrons move within an area around the nucleus.
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atomic cloud | number of protons in the nucleus of an atom
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mass number | the total number of protons and neutrons in an atom's nucleus.
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periodic table | Mendeleev's arrangement of the elements
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chemical symbol | is an abbreviation for the element's name.
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average atomic mass | an atom is the weighted average of the mass of all the naturally occurring isotopes of that element.
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metal | are elements that are shiny and conduct heat and electricity well.
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nonmetal | are poor conductors of heat and electricity.
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metalliod | are elements that have some properties of metals and some properties of nonmetals.
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group | each vertical column of elements(from top to bottom) on the periodic table.
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period | each horizontal row of elements(from left to right) on the periodic table.
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Created by:
18tgal0513
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