Chapter 6 Vocabulary Flashcards Preview

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Flashcards in Chapter 6 Vocabulary Deck (37)
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1

Atoms

The building blocks of matter

2

Nucleus

Neutrons and protons located at the center of the atom

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Protons

Positively charged particles

4

Neutrons

Particles with no charge

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Electrons

Negatively charged particles

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Element

Pure substance that cannot be broken down into other substances by physical or chemical means

7

Isotopes

Atoms of the same element that have different number of neutrons

8

Compound

A pure substance formed when two or more different elements combine

9

Covalent Bond

The chemical bond that forms when electrons are shared

10

Molecule

A compound in which the atoms are held together by covalent bonds

11

Ion

An atom that has lost or gained one or more electrons, and carries an electric charge

12

Ionic Bond

An electrical attraction between two oppositely charged atoms or groups of atoms called ions

13

Van Der Waals Forces

Attractive forces between molecules

14

Chemical Reaction

The process by which atoms or groups of atoms in substances are reorganized into different substances

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Reactant

Substance that exists before a chemical reaction starts; located on left side of equation

16

Product

The substances formed during a chemical reaction; located on right side of the equation

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Enzymes

The biological catalysts that speed up the rate of chemical reactions in biological processes

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Substrate

The reactants that bind to the enzyme

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Active site

The specific location where a substrate binds on an enzyme

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Polar Molecules

Molecules that have an unequal distribution of charges

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Hydrogen Bond

A weak interaction involving a hydrogen atom and a fluorine, oxygen, or nitrogen atom

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Mixture

A combination of two or more substances in which each substance retains its individual characteristics and properties

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Solution

A homogeneous mixture / When a mixture has uniform composition throughout

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Solvent

A substance in which another substance is dissolved

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Solute

The substance that is dissolved in the solvent

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Acids

Substances that release hydrogen ions when they are dissolved in water

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Bases

Substances that release hydroxide ions when they are dissolved in water

28

pH

The measure of concentration of H+ in a solution

29

Buffers

Mixtures that can react with acids or bases to keep the pH within a particular range

30

Macromolecules

Large molecules that are formed by joining smaller organic molecules together