Elements 21-40, Unit 2

Question 1

Sc

Answer 1

Scandium

Question 2

Ti

Answer 2

Titanium

Question 3

V

Answer 3

Vanadium

Question 4

Cr

Answer 4

Chromium

Question 5

Ma

Answer 5

Manganese

Question 6

Fe

Answer 6

Iron

Question 7

Co

Answer 7

Cobalt

Question 8

Ni

Answer 8

Nickel

Question 9

Cu

Answer 9

Copper

Question 10

Zn

Answer 10

Zink

Question 11

Ga

Answer 11

Gallium

Question 12

Ge

Answer 12

Germanium

Question 13

As

Answer 13

Arsenic

Question 14

Se

Answer 14

Selenium

Question 15

Br

Answer 15

Bromine

Question 16

Kr

Answer 16

Krypton

Question 17

Simple distillation

Answer 17

Separate liquid from solution
Basically evaporation but gas goes into tubes and cooled back down into a liquid leaving the distillate as water and the salt is left in the original container

Question 18

Separating funnel

Answer 18

Water and oil (ex) put in funnel, slowly release until the line of divide. Oil is left on top water is in the beaker below

Question 19

Exothermic

Answer 19

Gives of heat

Question 20

Endothermic

Answer 20

Uses heat energy

Question 21

Solute

Answer 21

A substance dissolved in a solution
Ex: salt in water

Question 22

Solvent

Answer 22

Substance that dissolves a solute
Ex: water

Question 23

Residue

Answer 23

Material remaining after evaporation or distilling

Question 24

Filtrate

Answer 24

Material that has passed through a filter
Ex: most of the time water

Question 25

Precipitate

Answer 25

Formation of a solid in a solution

Question 26

Absolute error

Answer 26

l experimental - accepted l = g/ml

Question 27

% error

Answer 27

l experimental - accepted l
______________________________ x 100 = %
Accepted

Question 28

Physical property

Answer 28

Can be observed without changing identity of a substance

Question 29

Chemical property

Answer 29

Describes ability of substance to undergo changes in identity
Ex: flammability, reactivity, toxicity, possible chemical bonds

Question 30

Physical change

Answer 30

Changes form of substance without changing identify
Chemical properties remain the same

Question 31

Chemical change

Answer 31

Changes identity of substance
Products have different properties

Question 32

Physical change main observations

Answer 32

Change in state/ phase
Change in size
Change in shape

Question 33

Indications of chemical change

Answer 33

Production of light
Production of heat
Production of gas (bubbles)
Color change *
Change in odor
Formation of a precipitate
Gets cold without coolant
Gives of smoke
Change in texture *
Change in appearance *

Question 34

Observation

Answer 34

Anything you know based off of senses

Question 35

Inference

Answer 35

An educated guess based off of senses

Question 36

Alloy

Answer 36

Homogenous mix of metals

Question 37

Volume vs mass vs density calculation

Answer 37

Mass
Density Volume

Question 38

Chromatography

Answer 38

Coloring agents in food or inks
Ink spread on filter paper. Paper placed in solvent. Attracts chemicals on its way up