Chemistry {Term 4}

Question 0

Alloy: Bronze
What is its...
-Composition
-Use
-Advantage

Answer 0

• 95% Cu 5% Sn
• Statues, ornaments, bells
• Doesn’t corrode, harder than brass, stronger than Cu

Question 1

Alloy: Brass
What is its...
-Composition
-Use
-Advantage

Answer 1

• 70% Cu 30% Zn
• Instruments, door handles, boat fittings
• Looks good, resists corrosion, stronger than its base metal

Question 2

Alloy: Duralumin 
What is its...
-Composition
-Use
-Advantage

Answer 2

• 96% Al 4% Cu (ft. Mg & Mn)
• Aircraft frames
• Very light, Stronger than aluminium

Question 3

Alloy: Solder
What is its...
-Composition
-Use
-Advantage

Answer 3

• 65% Sn 35% Pb
• Joining metals, electrical wiring, low friction bearings
• Easy to melt, easy to use

Question 4

Alloy: Steel
What is its...
-Composition
-Use
-Advantage

Answer 4

• 99% Fe 1% C
• Staples, nails, screws, beams, ship hulls, skyscrapers
• Stronger than iron, malleable, stronger than base metal, harder

Question 5

Alloy: Dental Alagam
What is its...
-Composition
-Use
-Advantage

Answer 5

• 50% Hg 33% Ag 10% Cu 2% Zn (ft. Sn)
• Tooth fillings
• Hardens slowly after being mixed

Question 6

F-

Answer 6

Fluoride

Question 7

Cl-

Answer 7

Chloride

Question 8

Br-

Answer 8

Bromide

Question 9

I-

Answer 9

Iodide

Question 10

OH-

Answer 10

Hydroxide

Question 11

HCO3-

Answer 11

Hydrogen Carbonate

Question 12

NO3-

Answer 12

Nitrate

Question 13

O2-

Answer 13

Oxide

Question 14

S2-

Answer 14

Sulfide

Question 15

CO32-

Answer 15

Carbonate

Question 16

SO32-

Answer 16

Sulfite

Question 17

SO42-

Answer 17

Sulfate

Question 18

P3-

Answer 18

Phosphide

Question 19

N3-

Answer 19

Nitride

Question 20

PO43-

Answer 20

Phosphate

Question 21

C4-

Answer 21

Carbide

Question 22

H+

Answer 22

Hydrogen

Question 23

Li*

Answer 23

Lithium

Question 24

Na+

Answer 24

Sodium

Question 25

K+

Answer 25

Potassium

Question 26

Cu+

Answer 26

Copper

Question 27

Ag+

Answer 27

Silver

Question 28

NH4+

Answer 28

Ammonium

Question 29

Mg2+

Answer 29

Magnesium

Question 30

Ca2+

Answer 30

Calcium

Question 31

Ba2+

Answer 31

Barium

Question 32

Fe2+

Answer 32

Iron (II)

Question 33

Ni2+

Answer 33

Nickel

Question 34

Cu2+

Answer 34

Copper (II)

Question 35

Co2+

Answer 35

Cobalt

Question 36

Zn2+

Answer 36

Zinc

Question 37

Hg2+

Answer 37

Mercury

Question 38

Pb2+

Answer 38

Lead (II)

Question 39

Sn2+

Answer 39

Tin (II)

Question 40

Al3+

Answer 40

Aluminium

Question 41

Fe3+

Answer 41

Iron (III)

Question 42

Pb4+

Answer 42

Lead (IV)

Question 43

Sn4+

Answer 43

Tin (IV)

Question 44

What is a Cation?

Answer 44

A cation is a positively charged ion that’s atom has lost electrons to become stable.

Question 45

What is an Anion?

Answer 45

An anion is a negatively charged ion that’s atom has gained electrons to become stable.

Question 46

What is an Ionic Compound?

Answer 46

An Ionic Compound is made up of cations and anions by the attraction of opposite forces, it is balanced and has no overall charge.

Question 47

What is an Ion?

Answer 47

An Ion is an atom that has lost or gained electrons and result in having an electronic charge.

Question 48

What is a Metalloid?

Answer 48

A Metalloid is an element that displays the properties of a non-metal but conducts electricity like a metal under certain conditions. They’re also known as semi-metals. Eg: Si, Silicon

Question 49

What is an Alloy?

Answer 49

An alloy is a mixture of a base metal and small amounts of any other element.

Question 50

What does Brittle mean?

Answer 50

Able to shatter if hit under little force.

Non-metals

Question 51

What does Ductile mean?

Answer 51

Metals that are able to stretch into wires.

Question 52

What does Malleable mean?

Answer 52

Metals that are able to be hit/hammered into new shapes.

Question 53

What does Lustrous mean?

Answer 53

Metals that shine when polished or freshly cut.

Question 54

What is a Thermal Conductor?

Answer 54

A Thermal Conductor is a metal that can pass heat easily along through it.