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35 Cards in this Set
- Front
- Back
anything that has mass and takes up _______ |
matter. space |
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small particle that is a building block of matter |
atom |
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center of an atom |
nucleus |
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the nucleus is made up of __________ which have a __________ charge |
proton. positive |
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the nucleus is all made up of ____________ which have __________ charge |
neutron. neutral or no charge |
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not all atoms have the same numbers of protons, __________, and electron |
neutrons |
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matter with a composition that is always the same |
substance |
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one type of substance is an ____________, which contains only one type of atom |
element |
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each type of atom contains a different number of ________ in its nucleus |
protons |
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the number of protons in an atom is called the _______ of an atom |
atomic number |
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most elements consist of __________ atoms, but the atoms of some elements exist in ___________ |
individual. groups |
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type of substance containing atoms of two or more different elements chemically bonded together |
compound |
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a chemical ________ is the combination of symbols and ________ that represent a compound |
formula. numbers |
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the symbols in a chemical formula show the different ________ in the compound |
element |
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the number of each type of atom in a chemical formula is given by a __________ |
subscript |
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if no subscript is written, only _______ atom of the element is in the chemical formula |
one |
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the properties of a _____________ are different from the properties of the elements it contains |
compund |
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matter that can vary in composition |
mixture |
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the components of a mixture are ______ blended together, so they can be separated by _______ means |
physically. physical method |
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the amounts of different components of a mixture can ________ from one sample to another |
vary |
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mixture, the individual substances are not evenly mixed |
heterogeneneous |
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mixture, the individual substances are evenly mixed together |
homogeneous |
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another name for a homogeneous mixture is a _______ |
solution |
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in a solution, one or more ________ are dissolved in the ___________ which is the substance that is present in the largest amount |
pollutes. solvent |
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when something _________, it forms a solution by mixing evenly |
dissolves |
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chemical formulas can be used to describe _________ but not ___________ |
compound. solution |
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the components of a compound are ________ combined, but the components of a solution are _______ combined |
chemically. physically |
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the composition of a _________ can vary, but the composition of a _______ does not vary |
solution. compound |
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what particles make up atoms |
protons, neutrons, electrons |
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describe the electrical charges of the particles in an atom |
protons-positive neutron-neutral or no charge electrons-negative |
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what are the two main classifications of matter |
substances and mixtures |
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how do the two main classifications of matter differ |
substances do not vary in compositions and mixtures can vary in compositions |
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how are elements related to compounds |
each compound is made of atoms of two or more different elements chemically bonded together |
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what can you learn about a compound from its chemical formula |
the different atoms that make it up |
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compare solvent and a solute |
a solvent is the substance that is present in the largest amount of a substance and everything is a solute. solutes dissolve in the solvent |