Chemestry Flashcards

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1
Q

Change in form, NOT composition
NO new substances formed
Change can be reversed

A

Physical Change

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2
Q

Re-arrangement of atoms
1 or more new substances formed
Difficult or impossible to reverse

A

chemical change

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3
Q

quantitive physical property

A

(measurable, e.g. boiling point)

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4
Q

qualitative physical property

A

(without measurement, e.g. color)

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5
Q

physical property

A

observed/measured without forming a new substance

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6
Q

chemical property

A

how a substance reacts with another substance

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7
Q

Diatomic molecules

A

BrINClHOF - elements will always present together when alone

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8
Q

Molecules

A

cluster of atoms

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9
Q

Ionization

A

(transferring electrons between atoms and therefore altering the balance of negative and positive charges)

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10
Q

which does not create ions? molecular or ionic?

A

molecular

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11
Q

when 2 + substances undergo a reorganization of atoms to form other substances

A

chemical reaction

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12
Q

To break bonds, energy must be added / absorbed

A

endothermic

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13
Q

To form bonds, energy must be released

A

exothermic

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14
Q

combustion products

A

CO2 + 2H2O + heat

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15
Q

corrosion reactants

A

metal + salty water + air

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16
Q

enzyme

A

biological catalyst

17
Q

other reaction types

A

formations, decompositions, and replacements (single or double)