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Transcript of Chlorine Cl 2 Hydrogen chlorideHCl Methane CH 4 Carbon dioxide CO 2 Draw a line between the molecule...
![Page 1: Chlorine Cl 2 Hydrogen chlorideHCl Methane CH 4 Carbon dioxide CO 2 Draw a line between the molecule and its name.](https://reader033.fdocuments.in/reader033/viewer/2022061615/551c0c99550346a84f8b51cf/html5/thumbnails/1.jpg)
Chlorine Cl2
Hydrogen chlorideHCl
Methane CH4
Carbon dioxide CO2
Draw a line between the molecule and its name.
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Objectives:1. There are billions of materials in our
universe.2. Those materials are made up from
about 100 elements only.
8EAtoms and Elements
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An element is a substance that is made from one kind of atom only. It cannot be broken down into simpler substances.
An element
An element
atom atom
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A compound is a substance that is made from more than one element.
atom atom
A compound made up of 2 different elements
A compound made up of 7 different elements
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A compound can be broken down into elements
A compound made up of 3 different elements
An element
An element
An element
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Material Made up of: Element or compound
Water Hydrogen and Oxygen
Coal Carbon
Carbon dioxide
Carbon and Oxygen
Oxygen Oxygen
Chalk Calcium, Carbon & Oxygen
Wax Carbon & Hydrogen
Table salt Sodium & Chlorine
Caffeine Carbon, Hydrogen, Nitrogen & Oxygen
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Material Element or compound
Water Compound
Coal Element
Carbon dioxide Compound
Oxygen Element
Chalk Compound
Wax Compound
Table salt Compound
Caffeine Compound
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Objective:
To learn the symbols and properties of 20 elements in the periodic table.
The Periodic Table
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The Periodic Table is a useful way to arrange elements.
The vertical columns are called groups.
The horizontal rows are called periods.
Elements in the same group have similar properties.
Three quarters of the elements are metals.
One quarter of the elements are non-metals.
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Rules for chemical symbols in the periodic table:
1. The symbol is usually the first one or two letters of the name.
2. Sometimes the old (Latin) name is used .
3. The first letter of a symbol id always a capital letter.
4. The second letter of a symbol is always a small letter.
5. Every element has a different symbol.
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Now look in your periodic table and find the symbols of the following elements, then find out if it is a metal or a non-metal:
Copper ……..
Iron ………..
Magnesium ………..
Chlorine ………..
Carbon …………
Sodium …….
Lead ……….
Gold ………
Calcium ……..
Fluorine ……….
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Now look in your periodic table and find name that corresponds to the following symbol:
Fe ……..
Mg ………..
Ag ………..
K ………..
C …………
Ca …….
Na ……….
N ………
Ne ……..
Pb ……….
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Fe
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Cu
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N
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F
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K
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Zn
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Li
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Al
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O
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The Periodic TableQ1. The symbol of Nitrogen is:a. Na b. N c. Ni
Q2. Hg is the symbol of:a. Hydrogen b. Helium c. Mercury
Q3. The percentage of metals in the periodic table is:a. 75% b. 50% c. 25%
Q4. Water is not in the periodic table because:a. It is a liquid substance b. It is a natural substancec. It is a compound not an element
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The Periodic TableQ1. The symbol of Nitrogen is:a. Na b. N c. Ni
Q2. Hg is the symbol of:a. Hydrogen b. Helium c. Mercury
Q3. The percentage of metals in the periodic table is:a. 75% b. 50% c. 25%
Q4. Water is not in the periodic table because:a. It is a liquid substance b. It is a natural substancec. It is a compound not an element
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Objective:
To learn the symbols and properties of 20 elements in the periodic table.
The Periodic Table
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Q5. Name a gas in group 7 that is in the same period as Aluminium.
Q1. Name a metal in group 1 that is in the same period as Magnesium.
Q2. Name a metal in group 2 that in the same period as Lithium.
Q3. Name a non-metal in the same group as Nitrogen.
Q4. Name a noble gas in the same period as Oxygen.
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Objective: 1. Learn the scientific method for naming compounds.2. There are three rules for naming compounds: the “ide” rule, the “ate” rule and the “same” rule.
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Rule 1: When two elements combine the ending is usually ” ……………ide”. metal goes first
Sodium Chloride
Magnesium Oxide
Iron Sulphide
Na
Cl
Mg
O
Fe S
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Rule 2: When three or more different elements combine and one of them is Oxygen, the ending will be “………ate”.metal goes first
Copper Sulphate
Calcium Carbonate
CuS
O
OO
O
Ca CO
O
O
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Rule 3: When two identical elements combine, the name does not change.
H2 = Hydrogen
F2 = Fluorine
N2 = Nitrogen
Cl2 = Chlorine
O2 = Oxygen
H H
N N
O O
F F
Cl Cl
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Name the following compound
Na2O
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Name the following compound
CuSO4
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Name the following compound
MgSO4
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Name the following compound
ZnO
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Name the following compound
MgCl2
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Name the following molecule
H2
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Name the following compound
KI
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Name the following compound
AgNO3
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Fill in the blanks:
Magnesium + ……………. Magnesium oxide
……………….. + Iodine Hydrogen …………..
……………. + Oxygen Iron oxide
Copper oxide + Carbon ………….. + Carbon dioxide
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Objectives: 1. In all chemical equations the reactants turn into products and we have an arrow between the two as shown here:
Reactants Products
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TheThe thermit reaction is used by the railway engineers to mend cracked iron rail.
It is a very useful reaction between Aluminium and Iron oxide to produce Aluminium oxide and Iron.Aluminium + Iron oxide Aluminium oxide + Iron
The reaction gives out a lot of heat, enough heat to melt the Iron produced which can be therefore poured into the gaps in the rails.
Reaction
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Copy down the following equations in your book. Underline the reactants and circle the products in each of the equations:
Magnesium + Oxygen Magnesium oxide
Iron + Oxygen Iron oxide
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1.When you react Magnesium with Oxygen you get:
a. Oxygen magnesimide b. Magnesium oxygen
c.Magnesium oxide d. Magnesium oxate
2. One of the products of the thermit reaction is:
a.Iron oxide b. Aluminium c. Carbon d. Iron
3. Sodium is in the same group as:
a.Magnesium b. Aluminium c. Potassium d. Neon
4. The colour of Magnesium oxide is:
a.White b. Black c. Silver d. Brown
5. Calcium Carbonate does not contain:
a. Hydrogen b. Oxygen c. Carbon d. Calcium
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1.When you react Magnesium with Oxygen you get:
a. Oxygen magnesimide b. Magnesium oxygen
c.Magnesium oxide d. Magnesium oxate
2. One of the products of the thermit reaction is:
a.Iron oxide b. Aluminium c. Carbon d. Iron
3. Sodium is in the same group as:
a.Magnesium b. Aluminium c. Potassium d. Neon
4. The colour of Magnesium oxide is:
a.White b. Black c. Silver d. Brown
5. Calcium Carbonate does not contain:
a. Hydrogen b. Oxygen c. Carbon d. Calcium
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Copy down the following equations in your book. Underline the reactants and circle the products in each of the equations:
Magnesium + Oxygen Magnesium oxide
Calcium carbonate Calcium Oxide + Carbon dioxide
Iron + Bromine Iron bromide
Aluminium + Chlorine Aluminium Chloride
Iron + Oxygen Iron oxide
Lead oxide + Carbon Lead + Carbon dioxide
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1.What is the name of the reaction used by the railway engineers to mend cracked iron rails?
2. What are the reactants of that reaction?
3.What are the products of that reaction?
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Chlorine Cl2
Hydrogen chlorideHCl
Methane CH4
Carbon dioxide CO2
Draw a line between the molecule and its name.
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Chemical Reactions
Objectives:
1. The formula of a compound shows the number and the type of atoms in it.
2. A small number after the symbol for each element in a compound shows how many atoms each molecule contain.
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Draw a line between the compound and its name:
Magnesium Carbonate NaCl
Magnesium Chloride
Iron sulphide
Lead nitrate
Copper sulphate
Sodium Chloride
Potassium Iodide
Calcium Carbonate
Pb(NO3)
2FeS
CuSO4
CaCO3
ZnF2
MgCO3
KI
Zinc Fluoride
MgCl2
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1. How many atoms of Hydrogen in one molecule of Methane CH4 ?
2. How many atoms of Nitrogen in one molecule of Lead nitrate Pb(NO3)2 ?
3. Sodium oxide has two atoms of sodium for every atom of oxygen. What is the formula for sodium oxide?
4. Magnesium chloride has one atom of Magnesium for every two atoms of chlorine. What is the formula for Magnesium chloride?
5. How many atoms of Nitrogen in one molecule of Ammonia NH3 ?
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1.How many atoms of Oxygen is there is two molecules of CuSO4 ?
a.1 b. 4 c. 6 d. 8
2. Oxygen will:
• turn limewater milk b. relight a glowing splint
c. burn with a squeaky pop d. put out a glowing splint
3. How many atoms are there altogether in one
molecule of MgCl2 ?
• 2 b. 3 c. 4 d. 6
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Chemical Reactions
Objectives: 1. The number of atoms in the reactants are equal to the number of atoms in the products.
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Mg + 2 HCl MgCl2 + H2
What are the reactants of the above reaction?
What are the products?
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Mg + 2 HCl MgCl2 + H2
MgH H
ClC
l
Give me your Chlorine and get out of here.
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Mg + CuO MgO + Cu
Mg
Cu
Give me your Oxygen and get out of here.
Oxygen
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Thermal Decomposition
Objective: Compounds can be broken down into smaller substances using heat.
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Test for gases
Carbon dioxide
relights a glowing splint
Oxygen
Hydrogen
burns with a squeaky pop
turns limewater cloudy
Draw a line between the name of the gas and the method to test for it.
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Investigating whether a mystery substance is an element or a compound.
?mystery substance
compound
element
metal
non-metal
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What do you think the mystery substance is ???
CuO + CO2
thermal decompositi
on
…………………..