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20 Cards in this Set
- Front
- Back
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Atoms
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basic building blocks of life
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Elements
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substance that is only made up of 1 atom
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Compounds
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Two or more kinds of atoms are combinded in definite proportions.
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Nucleus
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a small central part of an atom
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Protons
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small unit of mass that has positive electric charge
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Neutrons
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Small unit of mass that has a neutral charge
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Electrons
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One unit of negative electric charge
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Atomic number
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Tells how many units of positive charge are in the nucleus.
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Molecule
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Two or more atoms are combined and act as a single particle
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Covalent bond
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when a chemical bond is formed by the sharing of electrons
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Diatomic molecule
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a two-atom molecule
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Ionic bond
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Particles with opposite charges attract each other.
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Chemical formula
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Atoms combined in definite proportions.
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Structural formula-
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Is the number and kind of atoms in a molecule but also how the atoms are bonded to one another
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Reactants-
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The substances that were present before the reaction started
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Products-
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The new substances produced by the reaction
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Law of conservation of mass
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Mass can be neither created nor destroyed
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Base
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a compound that produces hydroxide ions when dissolved in water
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Neutralization
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Process of reacting an acid base to produce a neutral solution .
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Chemical bond
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sharing of electrons by two atoms crate a force of attraction that holds the atoms together
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