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DCA Review Exam UPDATED QUESTIONS AND CORRECT ANSWERS

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DCA Review Exam UPDATED QUESTIONS AND CORRECT ANSWERS Matter - CORRECT ANSWER Anything that has mass and occupies space. Physical property - CORRECT ANSWER A characteristic of a pure substance that can be observed without changing it into another substance. Chemical property - CORRECT ANSWER A characteristic of a pure substance that describes its ability to change into different substances. Element - CORRECT ANSWER A pure substance that cannot be broken down into simpler substances by physical or chemical means. Atom - CORRECT ANSWER element. Smallest unit of matter that retains the properties of an Chemical bond - CORRECT ANSWER together. Molecule - CORRECT ANSWER A force of attraction that holds two atoms A particle formed when two or more atoms are held together by chemical bonds.- ex. O2 and H2O Mass - CORRECT ANSWER Compound - CORRECT ANSWER chemically combined in a set ratio. A measure of the amount of matter in an object. A pure substance made of two or more elements

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DCA Review Exam UPDATED QUESTIONS
AND CORRECT ANSWERS
Matter - CORRECT ANSWER Anything that has mass and occupies space.



Physical property - CORRECT ANSWER A characteristic of a pure substance that can
be observed without changing it into another substance.



Chemical property - CORRECT ANSWER A characteristic of a pure substance that
describes its ability to change into different substances.



Element - CORRECT ANSWER A pure substance that cannot be broken down into
simpler substances by physical or chemical means.



Atom - CORRECT ANSWER Smallest unit of matter that retains the properties of an
element.



Chemical bond - CORRECT ANSWER A force of attraction that holds two atoms
together.



Molecule - CORRECT ANSWER A particle formed when two or more atoms are held
together by chemical bonds.- ex. O2 and H2O



Mass - CORRECT ANSWER A measure of the amount of matter in an object.



Compound - CORRECT ANSWER A pure substance made of two or more elements
chemically combined in a set ratio.



Chemical formula - CORRECT ANSWER A combination of symbols that represents
the elements in a compound and their proportions.
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