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CHEM103 > EXAM 1 > Flashcards

EXAM 1 Flashcards

1
Q

kilo-

A

10^3 (thousand)

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2
Q

centi-

A

10^-2 (one hundredth)

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3
Q

milli-

A

10^-3 (one thousandth)

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4
Q

micro-

A

10^-9 (one billionth)

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5
Q

pico-

A

10^-12

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6
Q

accuracy

A

measurements are close to known value

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7
Q

precision

A

measurements are close to each other (reproducible)

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8
Q

physical property

A

property of a substance that can be observed without changing the chemical composition of the substance

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9
Q

chemical property

A

a property of substance that can only be measured by changing a substance’s chemical identity

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10
Q

intensive property

A

does not depend on amount of matter

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11
Q

extensive property

A

does depend on the amount of matter

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12
Q

Carbonate

A

CO3^2-

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13
Q

Cyanide

A

CN^-

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14
Q

Ammonium

A

NH4^+

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15
Q

Nitrate

A

NO3^-

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16
Q

Hydroxide

A

OH^-

17
Q

Phosphate

A

PO4^3-

18
Q

Sulfate

A

SO4^2-

19
Q

atom

A

the smallest particle of an element which maintains its chemical properties

20
Q

element

A

a substance composed of only single kind of atom (eg H2)

21
Q

compound

A

a molecule made of atoms from a different elements

22
Q

molecule

A

two or more atoms joined by chemical bonds

23
Q

molecular formula

A

shows the actual number of each type of atom in a molecule

24
Q

empirical formula

A

shows the simplest whole-number ratio of atoms in a compound

25
Q

protons

A

positively charged particles

26
Q

neutrons

A

neutral particles roughly the same mass as protons

27
Q

electrons

A

negatively charged particles with a mass about 1/2000th that of other particles

28
Q

mass number

A

of protons + neutrons

29
Q

atomic number

A

of protons

30
Q

isotopes

A

atoms of an element containing the same # of protons but different #s of neutrons

31
Q

natural abundance

A

proportion of a particular isotope usually expressed as a percentage relative to all the isotope for that element in a natural example

32
Q

ion

A

atoms that gain or lose electrons and become charged

33
Q

cation

A

loses electrons - positive charge

34
Q

anion

A

gains electrons - negative charge

35
Q

zinc charge

A

2+

36
Q

silver charge

A

1+

37
Q

atomic mass

A

weighted average of all isotopes of an element

CHEM103 (2 decks)

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