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Biology > The Chemistry Of Life > Flashcards

The Chemistry Of Life Flashcards

1
Q

Atom

A

Basic until of matter

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2
Q

What are the subatomic particles that make up atoms?

A

Protons, Neutrons, and Electrons

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3
Q

Protons

A

Positively charged particles and neutrons carry no charge

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4
Q

Nucleus

A
  • center of atom

- protons and neutrons are strongly bound together

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5
Q

Electron

A
  • Negatively charged particle with 1/1840 the mass of a proton
  • Are in constant motion in the space surrounding the nucleus
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6
Q

Element

A

Pure substance that consists entirely of one type of atom

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7
Q

Isotopes

A

Atoms of the same element that differ in the number of neutrons

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8
Q

Compound

A

Substance formed by the chemical combination of two or more elements in definite proportions

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9
Q

Ionic Bond

A

Formed when one or more electrons are transferred from one atom to another

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10
Q

Ions

A

Positive and negatively charged atoms

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11
Q

Covalent Bond

A

Forms when electrons are shared between atoms

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12
Q

Molecule

A
  • Smallest unit of most compounds

- Atoms joined together by covalent bonds

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13
Q

Van der Waals Forces

A

Intermolecular forces of attraction

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14
Q

Choesion

A

Attraction between molecules of the same substance

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15
Q

Adhesion

A

Attraction between molecules of different substances

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16
Q

Mixture

A

Material composed of two or more elements or compounds that are physically mixed together but not chemically combined

17
Q

Solute

A

The substance that is dissolved

18
Q

Solvent

A

The substance in which the solute dissolves

19
Q

Suspensions

A

Mixtures of water and nondissolved material

20
Q

pH scale

A

To indicate the concentration of H+ ions in solution

21
Q

Acid

A

Any compound that forms H+ ions in a solution

22
Q

Base

A

Compound that produces hydroxide ions in solution

23
Q

Buffers

A

Weak acids or bases that can react with strong acids or bases to prevent sharp sudden changes in pH

Biology (8 decks)

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