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20 Cards in this Set
- Front
- Back
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An element
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simplest type of matter with unique chemical properties
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An atom
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smallest particle of an element that has the chemical characteristics of that element
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A neutron
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no electric chargw
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Proton
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one positive charge
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Nucleus
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protons and neutrons form this
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Atomic number
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# of protons in each atom
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Mass number
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protons and neutrons in each atom
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Isotopes
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two or more forms of the same element with different number of neutrons
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Avogadro's number
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number of atoms in 12g of C. 6.022*10^23
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Ion
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atom loses or gains electrons and number of protons and electrons aren't equal
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Cation
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positively charged ion
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Anion
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Negatively charged ion
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Covalent Bonding
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atoms share one or more pairs of electrons
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double covalent bond
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two atoms share four electrons, two from each atom
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non polar covalent bond
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electrons are shared equally between atoms
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polar covalent bond
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one atom attracts electrons more strongly than the nucleus of the other atom
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Molecule
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2 or more atoms chemically combine to form a structure that behaves as an independent unit
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Compound
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two or more different types of atoms, chemically combined.
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what isn't a molecule because the ions are held together by the force of attraction between opposite charges
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ionic compound
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Hydrogen bond
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positively charged hydrogen of one molecule is attracted to the negatively charged oxygen nitrogen or fluorine of another molecule
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