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Biology Review > Unit 2: Chemistry of life > Flashcards

Unit 2: Chemistry of life Flashcards

1
Q

What are protons?

A

-Positive charge
-Located in nucleus

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2
Q

What are neutrons?

A

-Neutral charge
-In the nucleus

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3
Q

What are electrons?

A

-Negative charge
-rotating around the nucleus

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4
Q

What is the atomic number?

A

The number of protons in an element

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5
Q

How do you know how many neutrons are in an element?

A

You would have to subtract the atomic number from the atomic mass

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6
Q

Which four elements take up 96 percent of the human body?

A

CHON
-carbon
-hydrogen
-oxygen
-nitrogen

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7
Q

What is an organic molecule?

A

Has to have hydrogens bonded to carbons

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8
Q

What is a covalent bond?

A

Two atoms share a pair of electrons

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9
Q

What is an ionic bond?

A

An electron is transferred from one atom to another

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10
Q

What are reactants?

A

The starting materials for a chemical reaction

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11
Q

What are products?

A

New compounds that form in a chemical reaction

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12
Q

What is a chemical reaction?

A

Changes in color, taste, temperature, and smell. A gas or precipitate might form. The changes are irreversible.

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13
Q

What is a physical reaction?

A

Only changes in shape or phase. The original compound is still present. No new product is formed.

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14
Q

What is an acidic ion?

A

A solution with an abundance of H+ ions

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15
Q

What is a basic ion?

A

A solution with an abundance of OH- ions

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16
Q

What is a neutral ion?

A

Solutions with similar numbers of both ions

17
Q

What are carbohydrates?

A

-provide energy quickly
-these biomolecules contain two hydrogens for each oxygen

18
Q

What are lipids?

A
  • help cushion vital organs and provide insulation
  • these biomolecules contain long fatty acid tails attached to a glycerol head group
19
Q

What are proteins?

A
  • Enzymes belong to the category
  • amino acids are the building blocks for these biomolecules

Biology Review (7 decks)

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