Chemistry Of Life Flashcards

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1
Q

Matter:

A

Takes up space and has mass

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2
Q

Elements:

A

Periodic table, 92 in nature

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3
Q

Compounds

A

Substance with 2 or more diff elements with define ratio

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4
Q

What % of natural elements are essential?

A

25%, meairy they are a must for life

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5
Q

How many essential elements do plants humans need?

A

P:17 h:25

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6
Q

What are dominant essential elements

A

0, c, h, N
CA, p, K, S

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7
Q

Trace elements

A

Also essential but only in small amounts

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8
Q

Isotopes

A

Same proton, diff neutron

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9
Q

3 types of intramolecular bones

A

1, non-polar covalent
2. Polar covalent
③ ionic

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10
Q

Ionic bonds

A

Electro static between metal cation and non-metal anion
Greater than 1.7
Dissociate in polar like water
Ions carry charges and can conduct electricity

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11
Q

Covalent bunds

A

2 non metals, share pair of valence E
Less than 1.7

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12
Q

How does en work?

A

En ≠ 0 then bond is polar covalent
Closer to 1.7 the more polar
Polar covalent have unequal e sharing

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13
Q

Hydrophilic and hydrophobic of bonds (polar, nonpolar, ionic)

A

Hydrophilic: polar and ionic
Hydrophobic: non- polar

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14
Q

Formation of hydrogen bunds

A

Intermolecular
O, N F
High en difference

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15
Q

Reversible reactions

A

Eventually occur at same rateproducts and reactants stop changing:chemical equilibrium

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