EXAM 1

Question 1

kilo-

Answer 1

10^3 (thousand)

Question 2

centi-

Answer 2

10^-2 (one hundredth)

Question 3

milli-

Answer 3

10^-3 (one thousandth)

Question 4

micro-

Answer 4

10^-9 (one billionth)

Question 5

pico-

Answer 5

10^-12

Question 6

accuracy

Answer 6

measurements are close to known value

Question 7

precision

Answer 7

measurements are close to each other (reproducible)

Question 8

physical property

Answer 8

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

Question 9

chemical property

Answer 9

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

Question 10

intensive property

Answer 10

does not depend on amount of matter

Question 11

extensive property

Answer 11

does depend on the amount of matter

Question 12

Carbonate

Answer 12

CO3^2-

Question 13

Cyanide

Answer 13

CN^-

Question 14

Ammonium

Answer 14

NH4^+

Question 15

Nitrate

Answer 15

NO3^-

Question 16

Hydroxide

Answer 16

OH^-

Question 17

Phosphate

Answer 17

PO4^3-

Question 18

Sulfate

Answer 18

SO4^2-

Question 19

atom

Answer 19

the smallest particle of an element which maintains its chemical properties

Question 20

element

Answer 20

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

Question 21

compound

Answer 21

a molecule made of atoms from a different elements

Question 22

molecule

Answer 22

two or more atoms joined by chemical bonds

Question 23

molecular formula

Answer 23

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

Question 24

empirical formula

Answer 24

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

Question 25

protons

Answer 25

positively charged particles

Question 26

neutrons

Answer 26

neutral particles roughly the same mass as protons

Question 27

electrons

Answer 27

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

Question 28

mass number

Answer 28

# of protons + neutrons

Question 29

atomic number

Answer 29

# of protons

Question 30

isotopes

Answer 30

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

Question 31

natural abundance

Answer 31

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

Question 32

ion

Answer 32

atoms that gain or lose electrons and become charged

Question 33

cation

Answer 33

loses electrons - positive charge

Question 34

anion

Answer 34

gains electrons - negative charge

Question 35

zinc charge

Answer 35

2+

Question 36

silver charge

Answer 36

1+

Question 37

atomic mass

Answer 37

weighted average of all isotopes of an element