Chem. unit 1

Question 1

WHMIS

Answer 1

Workplace Hazardous Materials Information System

Question 2

Gas cylinder (WHMIS)

Answer 2

compressed gas, if exposed to certain temperatures or abuse can explode.

Question 3

Flame (WHMIS)

Answer 3

Flammable, fire or explosion hazard

Question 4

Flame over Circle (WHMIS)

Answer 4

Oxidizing materials. May explode or cause fire when exposed to combustibles and flammable substances.

Question 5

Corrosion (WHMIS)

Answer 5

Can corrode materials and flesh; strong acids and bases are usually corrosive

Question 6

Skull and Crossbones (WHMIS)

Answer 6

Toxic/poison. Can result in death or serious illness.

Question 7

Health Hazard (WHMIS)

Answer 7

Serious health effects. Caution, may cause long-term effects if repeatedly exposed. May cause irritation.

Question 8

Biohazard (WHMIS)

Answer 8

Bacteria, Fungi, viruses, parasites, and overall germs that can result in illness or death.

Question 9

Exploding Bomb (WHMIS)

Answer 9

Dangerously reactive materials. Explosives and highly unstable material at risk of exploding. Highly reactive

Question 10

Environment (WHMIS)

Answer 10

Environmentally hazardous, materials that can be toxic or damaging to the environment

Question 11

Chemicals at home

Answer 11

Hazardous Household Product Symbols (HHPS)

Question 12

Exclamation Mark (WHMIS)

Answer 12

Less serious health effects, caution, may cause non-immediate health effects in repeatedly exposed.

Question 13

Niels Bohr

Answer 13

1913 - Planetary model, electrons orbit the nucleus in orbits that have specific size and energy, energy of the orbit is related to its size, lowest energy found in the smallest orbit

Question 14

Structure of the Atom

Answer 14

Made up of three different subatomic particles: Protons, Neutrons, Electrons. Central nucleus (protons and neutrons) surrounded by orbiting electrons.

Question 15

Protons

Answer 15

Found in nucleus, positively charged

Question 16

Neutrons

Answer 16

Found in nucleus, neutral charge

Question 17

Electrons

Answer 17

Orbits nucleus, negatively charged

Question 18

Horizontal Rows

Answer 18

Periods

Question 19

Vertical Columns

Answer 19

Groups

Question 20

Group 1

Answer 20

Alkali Metals, shiny solids, soft, malleable and ductile, very reactive, react easily with water

Question 21

Group 2

Answer 21

Alkali Earth Metals, shiny solids, malleable and ductile, very reactive, react with oxygen to form substances called oxides

Question 22

Group 17

Answer 22

Halogens, very reactive, react with metallic elements to form salts

Question 23

Group 18

Answer 23

Noble Gases, inert gases, non-reactive, stable because of their complete electron levels

Question 24

Metals

Answer 24

Left of dark staircase. solid at room temp., shiny appearance, good conductors of heat and electricity, malleable ductile

Question 25

Metalloids

Answer 25

Border dark staircase. Properties somewhere in the middle of metals and non-metals.

Question 26

Non-metals

Answer 26

Right of dark staircase. Some gases some solid at room temp., poor conductors of heat and electricity, birttle and not ductile.

Question 27

Isotope

Answer 27

element that has the same number of protons but different number of neutrons

Question 28

Who organized the period table we use today

Answer 28

Mendeleev

Question 29

Max electrons in energy levels

Answer 29

1st level: 2 electrons
8
8
18

Question 30

Anions

Answer 30

Gain electrons, non-metals

Question 31

Cations

Answer 31

Lose electrons, metals

Question 32

John Dalton

Answer 32

1803 - solid sphere (Billiard or bowling ball model) , matter made up of small particles called atoms, atoms are indivisible, atoms of the same element have the same properties, atoms of different elements have different properties

Question 33

JJ Thomson

Answer 33

1904 - plum pudding model, an atom is electrically neutral, an atom is made out of a sphere of positive charges with negatively charged electrons embedded in it.

Question 34

Ernest Rutherford

Answer 34

1911- Nuclear model, atoms are mostly empty space, nucleus- positively charged core, electrons located outside the nucleus

Question 35

Erwin Schrodinger

Answer 35

1926- Quantum Mechanical Model, electrons dont move around the nucleus, electrons exist in specific energy levels as a cloud, electron cloud is the region of negative charges which surrounds the nucleus

Question 36

Methane

Answer 36

CH4

Question 37

Methanol

Answer 37

CH3 OH

Question 38

Ozone

Answer 38

O3

Question 39

Sucrose

Answer 39

C12 H22 O11

Question 40

Glucose

Answer 40

C6 H12 O6

Question 41

Ammonia

Answer 41

NH3

Question 42

Water

Answer 42

H2O