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Gen Bio 1 > Chapter 2 - Chemistry Pt 2 > Flashcards

Chapter 2 - Chemistry Pt 2 Flashcards

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Biology 101 flashcards
1
Q

What are the three different types of bonds?

A

Hydrogen bonds, ionic bonds, and covalent bonds

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2
Q

What two types of covalent bonds are there?

A

Nonpolar and polar covalent bonds

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3
Q

What are Nonpolar Covalent Bonds?

A

Equal sharing of electrons

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4
Q

What are Polar Covalent Bonds?

A

Unequal sharing of electrons

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5
Q

What is the strongest type of chemical bonds?

A

Double Covalent Bond

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6
Q

What aspect of a molecule allows the body to recognize it?

A

The shape of the molecule

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7
Q

What determines the “pull” or “dominance” of an atom in covalent chemical bonds?

A

Electronegativity (strength)

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8
Q

Molecules that contain only one element have what kind of electronegativity in covalent bonding?

A

Equal electronegativity

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9
Q

What bonds are formed when electronegativity is equal between bonding molecules?

A

Nonpolar covalent bonds

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10
Q

An atom or molecule with an electrical charge resulting from gain or loss of electrons is called:

A

An ion

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11
Q

What charge results in an ion when an electron is lost?

A

A positive charge

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12
Q

What charge results in an ion when an electron is gained?

A

A negative charge

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13
Q

What types of ions attract eachother?

A

Oppositely charged ions

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14
Q

When the attraction of ions hold together, it is called an

A

Ionic bond

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15
Q

What type of bond holds DNA together?

A

Hydrogen bonds

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16
Q

Life supporting properties of water include:

A

Cohesion, adhesion, temperature stability, and strong solvent properties (facilitates chemical reactions)

17
Q

The process in which water molecules cling together because of hydrogen bonding is called:

A

Cohesion

18
Q

Water’s positive and negative poles allowing it to stick to polar surfaces is called:

A

Adhesion (Ad, Youtube, Adhesion, Tube)

19
Q

Surface tension is related to:

A

Cohesion. Hydrogen bonds give water high surface tension

20
Q

What part of water allows it to have a greater ability to resist temperature change?

A

Its hydrogen bonds

21
Q

What is released when hydrogen bonds form?

A

Heat

22
Q

What part of evaporation allows remaining liquid to cool down?

A

Evaporative cooling

23
Q

In what forms can water exist?

A

Gas, liquid, or solid.

24
Q

What is a solution called when the solvent is water?

A

An aqueous solution

25
Q

The dissolving agent is called

A

a solvent

26
Q

The substance being dissolved is called

A

a solute

Gen Bio 1 (8 decks)

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