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Biology > Chemical Context Of Life > Flashcards

Chemical Context Of Life Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

There are 92 naturally occurring elements. How many are required for life?

A

25

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2
Q

What element is the most common in the human body

A

Oxygen

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3
Q

What element is the most abundant

A

Hydrogen

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4
Q

What is the nucleus made of.

A

Protons and neutrons

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5
Q

What is matter made up of.

A

Atoms

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6
Q

What determines an atoms element

A

Protons

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7
Q

What affect an elements stability

A

The amount of neutrons

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8
Q

What takes up the most space in an atom’s cloud

A

Electrons

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9
Q

What are isotopes

A

Atoms of an element with a different amount of neutrons

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10
Q

What atoms are radioactive

A

Unstable atoms

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11
Q

Protons carry what charge

A

A positive charge

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12
Q

Neutrons carry what charge

A

A neutral charge

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13
Q

Electrons carry what charge

A

A NEGATIVE charge

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14
Q

What determines an atoms chemical properties

A

The distribution of electrons

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15
Q

What will atoms do to have their valence electrons filled

A

Atoms will borrow additional electrons form other atoms of give up their valence electrons

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16
Q

Bonds with en difference of < 1.2 are

A

Nonpolar covalent bonds

17
Q

Bonds with an en difference of
1.2< en diff < 1.8 are what

A

Polar bonds

18
Q

Bonds with an en difference of > 1.8 are what

A

Ionic bonds

19
Q

How do hydrogen bonds form

A

Between the partial positive and negative charges in polar molecules

20
Q

Chemical reactions are reversible; when the forward and backwards reactions occur at the same rate it is in what

A

Chemical equilibrium

21
Q

What are the 6 most abundant elements in life

A

Carbon
Hydrogen
Nitrogen
Oxygen
Phosphorus
Sulfur

22
Q

What 4 elements make up 96.3% of your body mass

A

Oxygen
Carbon
Hydrogen
Nitrogen

23
Q

Atomic number equals

A

The number of protons

24
Q

Atomic mass equals

A

The number of protons and neutrons

25
Q

Why are covalent bonds stronger than ionic bonds?

A

Ionic bonds tend to depend on the environment . Ex. Temperature

Covalent bonds are not dependent on the environment.

Biology (5 decks)

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