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35 Cards in this Set
- Front
- Back
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Define: Element |
a pure substance that cannot be broken down into a simpler substance - SMALLEST UNIT OF MATTER |
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Define: COMPOUND |
a pure substance that is made of more than atom or element |
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Define: ATOM |
smallest unit of matter |
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Define: MOLECULE |
two or more elements combined; can be an element (H2, N2, O2) or a compound (CO2, H20) |
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True or False: a MOLECULE can be EITHER an ELEMENT or a COMPOUND |
true |
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Define: PURE SUBSTANCE |
made of ONLY ONE THING. i.e - Pure Element, Pure Molecule, Pure Compound |
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Define: MASS |
the amount of matter in an object |
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Define: VOLUME |
the amount of SPACE an object takes |
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Define: DENSITY |
the amount of matter in a GIVEN SPACE |
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Define: INDEPENDENT VARIABLE |
the part of the experiment that you MEASURE |
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Define: INDEPENDENT VARIABLE |
the ONE thing in an experiment that is CHANGED or MANIPULATED |
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What is the formula to calculate DENSITY? |
Density = Mass / Volume (D = M/V) |
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If Density = Mass divided by Volume (D=M/V), then how do you calculate volume? |
Volume (V) = Mass (M) / Density (D) |
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True or False: ATOMS are the SMALLEST PARTICLE of a substance? |
True |
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How many elements are found on the periodic table? |
? |
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True or False:Elements are smaller than Atoms? |
False! Atoms are the smallest particle of a substance |
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How many naturally occurring elements are there? |
92 |
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The current version of the periodic table is by: Mendeleev or Mendelsohn? |
Mendeleev |
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What year was the current version of the period table created? |
1869 |
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True or False:Elements do not have unique physical and chemical properties |
False! Elements DO have unique physical and chemical properties |
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Can elements be made in the laboratory? |
yes |
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Does "A" represent the Atomic Number or the Atomic Mass? |
Atomic Number |
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What does "B" represent in the image? |
Element Symbol |
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True or False: Atomic Mass is represented by "D" in this image. |
True |
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What is the chemical symbol for Oxygen? |
O |
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True or False: a chemical symbol can only be one letter |
False. A chemical symbol can be one letter or two. |
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True or False: if the chemical symbol has two letters, the FIRST LETTER IS ALWAYS CAPITALIZED and the second letter is always lowercase |
True! |
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True or False: Atoms can be the same element or different element |
True |
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True or False: TWO OR MORE atoms combined are a MOLECULE |
True |
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What is the difference between an ELEMENT molecule and a COMPOUND molecule? |
An ELEMENT Molecule is made up of 2 or more of the same element (O2) A COMPOUND Molecule is made of of 2 or more of TWO OR MORE DIFFERENT elements (H2O) |
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PRO-TIP! One capital letter = element Two or more capital letters = compound |
Boom! |
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Is H2SO4 an ELEMENT or a COMPOUND? |
Compound! |
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Is "Fe" an element or a compound? |
element! |
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"CH4 + O2" -- Identify how many compounds, elements, and atoms of each element are in the equation |
Compounds: 1 (CH4) Elements: 3 (C, H, and O) Atoms of each Element: 1 atom of C 4 atoms of H 2 atoms of O |
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True or False: Some element names come from Latin or Greek |
True |
