VDOE, Science 8, Unit 3: Chemical Bonding & Chemical Reactions

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Physical Science

VDOE

SOLs

Science 8

Last updated 8:14 PM on 10/12/26
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18 Terms

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Atom

the smallest building block of matter

<p>the smallest building block of matter</p>
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Metal

A hard, shiny material that can carry electricity and heat.

<p><span style="background-color: transparent; font-family: &quot;Open Sans&quot;, sans-serif;">A hard, shiny material that can carry electricity and heat.</span></p>
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Non-metal

A material that is not shiny or metallic and does not carry heat or electricity well

<p>A material that is not shiny or metallic and does not carry heat or electricity well</p>
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Electrons

Tiny, negatively charged particles that move around the outside of an atom.


<p><span style="background-color: transparent; font-family: &quot;Open Sans&quot;, sans-serif;">Tiny, negatively charged particles that move around the outside of an atom.</span></p><p></p>
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Molecule

Two or more atoms joined together

<p>Two or more atoms joined together</p>
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Yield

To produce or make something (in science, it shows what is made in a reaction).

<p><span style="background-color: transparent; font-family: &quot;Open Sans&quot;, sans-serif;">To produce or make something (in science, it shows what is made in a reaction).</span></p>
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Products

new substances made during a chemical reaction

<p>new substances made during a chemical reaction</p>
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Reactants

substances that are mixed or changed in a chemical reaction.

<p>substances that are mixed or changed in a chemical reaction.</p>
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Ion

An atom that has gained or lost electrons and now has a charge.

<p>An atom that has gained or lost electrons and now has a charge.</p>
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Ionic bonds

A type of chemical bond formed when one atom gives electrons to another atom.

<p>A type of chemical bond formed when one atom gives electrons to another atom.</p>
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Covalent bonds

A chemical bond formed when two atoms share electrons.

<p>A chemical bond formed when two atoms share electrons.</p>
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Coefficient

The number in front of a chemical formula that shows how many molecules or atoms there are.

<p>The number in front of a chemical formula that shows how many molecules or atoms there are.</p>
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Subscript

A small number written below in a chemical formula that shows how many atoms of an element are in one molecule.

<p>A small number written below in a chemical formula that shows how many atoms of an element are in one molecule.</p>
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Chemical reaction

A process where substances change into new substances.

<p>A process where substances change into new substances.</p>
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Endothermic

A reaction that absorbs heat or energy (feels cold).

<p>A reaction that absorbs heat or energy (feels cold).</p>
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Exothermic

A reaction that releases heat or energy (feels warm or hot).

<p>A reaction that releases heat or energy (feels warm or hot).</p>
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Chemical Equation

A way to show a chemical reaction using symbols and formulas.

<p>A way to show a chemical reaction using symbols and formulas.</p>
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Law of Conservation of Mass

Matter cannot be created or destroyed in a reaction; the total mass stays the same.

<p>Matter cannot be created or destroyed in a reaction; the total mass stays the same.</p>