Test Flashcards
What elements are liquids?
Bromine (Br) and mercury (Hg)
What elements are gasses?
Hydrogen, Helium, Neon,
Argon, Krypton, Xenon,
Radon, Fluorine, Chlorine,
nitrogen and oxygen
What are elements grouped according to?
Their physical and chemical properties
What group are the alkali metals found in?
Alkali metals are found in group 1
What group are the halogens found in?
Halogens are found in group 7
What group are noble gasses found in?
Noble gasses are found in group 0
Name one property of alkali metals
1𖤐 as you go down group 1 the reactivity increases
2𖤐 all of group 1 react with water and air
Name 1 property of halogens
1𖤐 halogens are non metals
2𖤐 halogens are highly reactive
3𖤐 halogens have low melting and boiling points
Name one property of noble gasses
1𖤐 noble gasses are colourless and odorless
2𖤐 noble gasses are non flammable
3𖤐 noble gasses have a low reactivity
What elements are metals and non metals?
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)
Where are transition metals on the periodic table?
Transition metals are positioned in the middle of the periodic table
What is meant by a property?
A property is a characteristic of a substance that can be used to identify or discribe how it behaves
What is the test for carbon dioxide (CO2)?
(What you need to determine if your experiment worked)
The test for co2 is putting out a burning splint
How do you make co2?
Carbon dioxide and lime water???
What is the importance of flame tests?
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
What is the symbol for solid
(S) is the symbol for solid
What is the symbol for liquid
(L) is the symbol for liquids
What is the symbol for gasses
(G) is the Symbol for gas or gasses
What is the symbol for…
aqueous solution (dissolved in water)
(Aq) is the symbol for aqueous solution
What effect does temperature have on the rate of reaction?
Temperature speeds up the reaction rate
What effect does the concentration have on the reaction rate?
A higher concentration speeds up the rate of reaction
What effect does the surface area have on the rate of reaction?
Increasing the surface area speeds up the reaction rate of an experiment
What is concentration a measure of?
Concentration is a measure of how much solute there is per the volume of a solution
What is a variable?
A factor that can change
(like if you where to test the boiling point of something the variable is the temperature)
What is classified as a fair test?
A fair test is when everything is the same but one variable (the category you are using to test)
What is the test for hydrogen gas?
(Like how do you test if you where successful in making it)
The test for hydrogen gas involves holding a lit splint near the top of a test tube containing the gas
What is surface area relative to?
Surface area is relative to particle size (meaning it basically the same)
What is valency a measure of?
Valency is a measure of the amount of bonds an element can make
What is the maximum valency of an element?
The maximum valency of an element is 8
What does an “-ide” compound mean?
An “-ide” compound means that there is 2 elements present in the compound
What does an “-ate” compound mean?
An “-ate” compound means that there is three or more elements present one of them being oxygen
What does an “-ite” compound mean?
An “-ite” compound means that there is 3 elements and one of them is oxygen
(though it has less concentration than an “-ate” compound)
What does a formula represent??
It so a way to represent a compound but in simpler terms
What is the definition of activation energy?
The activation energy is the minimum amount of energy required to start a reaction
What is a catalyst?
A catalyst is a substance that speeds up a chemical reaction
What is the test for oxygen gas?
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
What is the definition of an enzyme?
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)
What is a substrate?
The substrate is a molecule that an enzyme acts on to catalyse a chemical reaction
What does the term active site mean?
The active site is the part of an enzyme where the substrate binds (where the catalytic “action” happens)
What is the product in a chemical reaction?
Products are the things formed in chemical reactions
What is the Benedict reagent used to test?
Benedict’s reagent detects remaining reducing sugars in a sample
What colour change is observed with Benedict’s reagent?
Benedict’s reagent charges from blue to cloudy orange to brick red if heated with a reducing sugars in
What is burning a result of?
Burning is a result of fuels reaction with oxygen (referred to as combustion)
What do all combustion reactions have in common?
All combustion reactions release heat energy (referred to as an exothermic reaction)
What is fuel an example of?
Fuel is an example of a chemical that burns to release heat energy
When does an incomplete combustion occur?
Incomplete combustion occurs when not enough oxygen is present
Can you name a few examples of fuels…
(At least 4)
1𖤐 wood
2𖤐 coal
3𖤐 petroleum
4𖤐 natural gas
5𖤐 diesel
6𖤐 gasoline
7𖤐 kerosene
8𖤐 LPG
9𖤐 hydrogen
10𖤐 propane
11𖤐 methane
Can you name four substances you can get from crude oil?
𖤐 Diesel fuel.
𖤐 Butane.
𖤐 Kerosene.
𖤐 Gasoline.
𖤐 Fuel oil.
𖤐 Propane.
𖤐 Liquefied petroleum gas.
𖤐 Liquefied natural gas
What environmental problem is associated with crude oli?
disruption of migratory pathways, degradation of important animal habitats, and oil spills
