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Chemistry S2 > Test > Flashcards

Test Flashcards

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1
Q

What elements are liquids?

A

Bromine (Br) and mercury (Hg)

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2
Q

What elements are gasses?

A

Hydrogen, Helium, Neon,
Argon, Krypton, Xenon,
Radon, Fluorine, Chlorine,
nitrogen and oxygen

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3
Q

What are elements grouped according to?

A

Their physical and chemical properties

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4
Q

What group are the alkali metals found in?

A

Alkali metals are found in group 1

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5
Q

What group are the halogens found in?

A

Halogens are found in group 7

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6
Q

What group are noble gasses found in?

A

Noble gasses are found in group 0

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7
Q

Name one property of alkali metals

A

1𖤐 as you go down group 1 the reactivity increases
2𖤐 all of group 1 react with water and air

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8
Q

Name 1 property of halogens

A

1𖤐 halogens are non metals
2𖤐 halogens are highly reactive
3𖤐 halogens have low melting and boiling points

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9
Q

Name one property of noble gasses

A

1𖤐 noble gasses are colourless and odorless
2𖤐 noble gasses are non flammable
3𖤐 noble gasses have a low reactivity

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10
Q

What elements are metals and non metals?

A

Metals are to the left of the black line and non metals are to the right
(if there is no black line it is near the right and verticle)

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11
Q

Where are transition metals on the periodic table?

A

Transition metals are positioned in the middle of the periodic table

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12
Q

What is meant by a property?

A

A property is a characteristic of a substance that can be used to identify or discribe how it behaves

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13
Q

What is the test for carbon dioxide (CO2)?
(What you need to determine if your experiment worked)

A

The test for co2 is putting out a burning splint

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14
Q

How do you make co2?

A

Carbon dioxide and lime water???

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15
Q

What is the importance of flame tests?

A

Flame tests are important because they allow chemists to identify the presence of metal or metalloid ions in a compound by analyzing the color of the flame produced when the compound is burned

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16
Q

What is the symbol for solid

A

(S) is the symbol for solid

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17
Q

What is the symbol for liquid

A

(L) is the symbol for liquids

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18
Q

What is the symbol for gasses

A

(G) is the Symbol for gas or gasses

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19
Q

What is the symbol for…
aqueous solution (dissolved in water)

A

(Aq) is the symbol for aqueous solution

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20
Q

What effect does temperature have on the rate of reaction?

A

Temperature speeds up the reaction rate

21
Q

What effect does the concentration have on the reaction rate?

A

A higher concentration speeds up the rate of reaction

22
Q

What effect does the surface area have on the rate of reaction?

A

Increasing the surface area speeds up the reaction rate of an experiment

23
Q

What is concentration a measure of?

A

Concentration is a measure of how much solute there is per the volume of a solution

24
Q

What is a variable?

A

A factor that can change
(like if you where to test the boiling point of something the variable is the temperature)

25
Q

What is classified as a fair test?

A

A fair test is when everything is the same but one variable (the category you are using to test)

26
Q

What is the test for hydrogen gas?
(Like how do you test if you where successful in making it)

A

The test for hydrogen gas involves holding a lit splint near the top of a test tube containing the gas

27
Q

What is surface area relative to?

A

Surface area is relative to particle size (meaning it basically the same)

28
Q

What is valency a measure of?

A

Valency is a measure of the amount of bonds an element can make

29
Q

What is the maximum valency of an element?

A

The maximum valency of an element is 8

30
Q

What does an “-ide” compound mean?

A

An “-ide” compound means that there is 2 elements present in the compound

31
Q

What does an “-ate” compound mean?

A

An “-ate” compound means that there is three or more elements present one of them being oxygen

32
Q

What does an “-ite” compound mean?

A

An “-ite” compound means that there is 3 elements and one of them is oxygen
(though it has less concentration than an “-ate” compound)

33
Q

What does a formula represent??

A

It so a way to represent a compound but in simpler terms

34
Q

What is the definition of activation energy?

A

The activation energy is the minimum amount of energy required to start a reaction

35
Q

What is a catalyst?

A

A catalyst is a substance that speeds up a chemical reaction

36
Q

What is the test for oxygen gas?

A

The test for oxygen gas is when you light a splint and blow it out so the core is glowing and if the test is positive the splint will relight

37
Q

What is the definition of an enzyme?

A

An enzyme is a protein that speeds up chemical reactions in the body
(they are not destroyed after a reaction and can be used repeatedly)

38
Q

What is a substrate?

A

The substrate is a molecule that an enzyme acts on to catalyse a chemical reaction

39
Q

What does the term active site mean?

A

The active site is the part of an enzyme where the substrate binds (where the catalytic “action” happens)

40
Q

What is the product in a chemical reaction?

A

Products are the things formed in chemical reactions

41
Q

What is the Benedict reagent used to test?

A

Benedict’s reagent detects remaining reducing sugars in a sample

42
Q

What colour change is observed with Benedict’s reagent?

A

Benedict’s reagent charges from blue to cloudy orange to brick red if heated with a reducing sugars in

43
Q

What is burning a result of?

A

Burning is a result of fuels reaction with oxygen (referred to as combustion)

44
Q

What do all combustion reactions have in common?

A

All combustion reactions release heat energy (referred to as an exothermic reaction)

45
Q

What is fuel an example of?

A

Fuel is an example of a chemical that burns to release heat energy

46
Q

When does an incomplete combustion occur?

A

Incomplete combustion occurs when not enough oxygen is present

47
Q

Can you name a few examples of fuels…
(At least 4)

A

1𖤐 wood
2𖤐 coal
3𖤐 petroleum
4𖤐 natural gas
5𖤐 diesel
6𖤐 gasoline
7𖤐 kerosene
8𖤐 LPG
9𖤐 hydrogen
10𖤐 propane
11𖤐 methane

48
Q

Can you name four substances you can get from crude oil?

A

𖤐 Diesel fuel.
𖤐 Butane.
𖤐 Kerosene.
𖤐 Gasoline.
𖤐 Fuel oil.
𖤐 Propane.
𖤐 Liquefied petroleum gas.
𖤐 Liquefied natural gas

49
Q

What environmental problem is associated with crude oli?

A

disruption of migratory pathways, degradation of important animal habitats, and oil spills

Chemistry S2 (1 decks)

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