Flashcards- Ch 2 Basic Chemistry
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Science
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9th Grade
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Practice Problem
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Medium
Kelly Jones
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44 questions
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1.
FLASHCARD QUESTION
Front
Element
Back
A substance that cannot be broken down into other substances by chemical reactions. Found on the Periodic Table.
2.
FLASHCARD QUESTION
Front
Example of an Element
Back
Carbon (C) and Oxygen (O)
3.
FLASHCARD QUESTION
Front
Examples of importance of elements to living organisms
Back
Enlarged thyroid glands caused by iodine deficiency in humans.
Discoloration of leaves affecting overall health of plant due to nitrogen deficiency.
4.
FLASHCARD QUESTION
Front
Molecule
Back
A pure substance composed of one or more different elements combined in a fixed ratio. Examples include O2, N2, and H₂O. These ratios give them unique properties.
NOTE: All compounds are molecules but not all molecules are compounds. Ex: Water is both a molecule and a compound since it satisfies both definitions, but O2 is a only a molecule since a compound must involve more than one type of element in its chemical make-up.
5.
FLASHCARD QUESTION
Front
Compound
Back
A pure substance composed of two or more different elements combined in a fixed ratio. Examples include NaCl and H₂O. Compounds have unique properties beyond those of the combined elements.
NOTE: all compounds are molecules but not all molecules are compounds.
6.
FLASHCARD QUESTION
Front
Atom
Back
The smallest unit of matter that retains the physical and chemical properties of its element.
7.
FLASHCARD QUESTION
Front
Proton
Back
Charge: +
Location: Nucleus
# of protons identifies the element on the periodic table
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