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31 Cards in this Set
- Front
- Back
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The basic building blocks of all matter in the universe are called ______________________. |
Atoms |
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_________________ is the center of an atom. |
Nucleus |
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Protons have a ___________________ charge. |
Postitive |
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Neutrons are ________________ meaning they have___________ charge. |
1. Neutral 2. No Charge |
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____________________ have a negative charge. |
Electrons |
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Electrons rapidly revolve around the _______________________. |
Nucleus |
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Atoms combine to form______________________________. |
Molecules |
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Molecules combine to form____________________________. |
Elements |
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H2O is also known as _______________________________. |
Water |
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Water has _______parts hydrogen and _______part oxygen. |
1. 2 2. 1 |
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The number of _________________ in the nucleus makes one atom different from another |
Protons |
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An element is a substance made from ____________ that all have the same number ofprotons. |
Atom |
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The ________________________ ___________________ is a visual representation organizing all of the elements. |
1. Periodic 2. Table |
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There are about __________ elements that occur naturally. |
About 90 |
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H2O is the chemical formula for _____________________________. |
Water |
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NaCl is the chemical formula for _____________________________. |
Salt |
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19. C6H12O6 is the chemical formula for __________________________. 19. |
Sugar |
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Everything in the universe is either __________________ or matter. |
Energy |
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Examples of energy are __________________________, ____________________, and____________________________. |
1. Sound 2. Light 3.Heat |
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______________________ is an element that is the key to life. |
Oxygen |
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23. Chemical formula is also called _____________________ formula. |
Molecular |
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The molecular formula tells the number of each atom present in one ____________________ of a compound. |
Element |
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A ______________________________ is made by atoms of two or more elements combined by a chemical reaction. |
Compound |
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Properties of a compound are ____________________________ from the properties of the elements they are made from. |
Different |
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H2O is an example of a ____________________________________. |
Compound |
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Elements of a compound are ___________easily separated. |
Not |
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A _________________________ consists of two or more substances that are not chemically combined. |
Mixture |
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The substances within a mixture can be easily _______________________. |
Separated
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In a mixture, each substance maintains its _____________________________. |
Properties |
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A _________________________________ is a mixture in which one substance is alwaysdissolved. |
Solute or Solvent |
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Substances within solutions are ______________________ to separate. |
Very Hard |
