Term
Some elements achieve stable electron configurations through the
transfer of ___________ between atoms. |
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Definition
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| Is the following sentence true or false? An ion is an atom that has a net positive or negative electric charge. |
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Definition
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Term
| An ion with a negative charge is called a(n) |
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Definition
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Term
An ionic bond forms when _________ are transferred
from one atom to another. |
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Definition
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Term
| Describe a covalent bond. |
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Definition
A covalent bond is a chemical bond in which two atoms share
a pair of valence electrons. |
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Term
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Definition
A molecule is a neutral group of atoms that are joined together by one
or more covalent bonds. |
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Term
Is the following sentence true or false? In a covalent bond, the atoms
are held together by the attractions between the shared electrons
and the protons in each nucleus. |
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Definition
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Term
| Describe a polar covalent bond. |
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Definition
A polar covalent bond is a covalent bond in which electrons
are not shared equally |
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Term
Circle the letter of the word that describes a compound made from
only two elements. |
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Definition
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Term
| What type of alloy is used to make airplane parts that need to be extremely lightweight? |
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Definition
| An aluminum-magenesium alloy |
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Term
Is the following sentence true or false? A chemical equation must
be balanced in order to show that mass is conserved during a
reaction. |
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Definition
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Term
Circle the letter of the name given to the numbers that appear
before the formulas in a chemical equation. |
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Definition
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Term
Chemists use a counting unit called a(n) ___________ to
measure amounts of a substance because chemical reactions often
involve large numbers of small particles. |
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Definition
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Term
Is the following sentence true or false? A decomposition reaction is
the opposite of a synthesis reaction. |
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Definition
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Term
| The law of conservation of mass states that mass is... |
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Definition
| neither created nor destroyed in a chemical reaction. |
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Term
| A Synthesis reaction is a reaction in which... |
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Definition
| two or more substances react from a single substance. |
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Term
| A decomposition reaction is a reaction in which... |
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Definition
| a compound breaks down into two or more simpler substances. |
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Term
| A single-replacement reaction is a reaction in which... |
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Definition
| one element takes the place of another element in a compund. |
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Term
| A double-replacement compound is one in which... |
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Definition
| two different compunds exchange positive ions and form two new compunds. |
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Term
True or false?
exothermic: release energy (down)
endothermic: absorb energy (up) |
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Definition
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