Vocabulary Game

Содержание

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In the Periodic Table elements are arranged in order of? Atomic

In the Periodic Table elements are arranged in order of?
Atomic

mass
Atomic number
Density
Boiling point
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Neutral atoms of an element contain? Equal numbers of protons and

Neutral atoms of an element contain?
Equal numbers of protons and neutrons
Equal

numbers of electrons and neutrons
Equal numbers of protons and electrons
Equal numbers of protons, neutrons and electrons
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A vertical collection of elements in the Periodic Table are called? Groups Periods Columns Gases

A vertical collection of elements in the Periodic Table are called?

Groups
Periods
Columns
Gases
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A horizontal collection of elements in the Periodic Table are called? Groups Periods Rows Gases

A horizontal collection of elements in the Periodic Table are called?
Groups
Periods
Rows
Gases

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In the Periodic Table gases occur? On the left On the

In the Periodic Table gases occur?
On the left
On the left and

middle
On the right and middle
On the right
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In the Periodic Table metals occur? On the left On the

In the Periodic Table metals occur?
On the left
On the left and

middle
On the right and middle
On the Right
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The Group 7 Elements are also called? The halogens The transition

The Group 7 Elements are also called?
The halogens
The transition elements
The alkali

metals
The noble gases
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The Group 1 Elements are also called? The halogens The transition

The Group 1 Elements are also called?
The halogens
The transition elements
The alkali

metals
The noble gases
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In the Periodic Table metals get more reactive going towards? Top

In the Periodic Table metals get more reactive going towards?
Top

left
Top right
Bottom left
Bottom right
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Which of these electron arrangements could be a noble gas? 2.1, 2.5 2.7 2.8

Which of these electron arrangements could be a noble gas?
2.1,


2.5
2.7
2.8
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Which of these electron arrangements could be a halogen? 2.1, 2.5 2.7 2.8

Which of these electron arrangements could be a halogen?
2.1,

2.5
2.7
2.8
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Topic: Group 14 Recognise trends in chemical and physical properties down

Topic: Group 14
Recognise trends in chemical and physical properties down

the group
Be able to explain the shapes of the molecules of compounds
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The Carbon family group 14

The Carbon family group 14

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Groups – columns of elements Downward columns are called groups. Na Mg Means in-between

Groups – columns of elements

Downward columns are called groups.

Na

Mg

Means in-between

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GROUP 14 ?------------------------------------ Carbon ? ------------------------------------ Silicon ?------------------------------- Germanium ? ----------------------------------------- Tin ? ------------------------------------- Lead

GROUP 14 ?------------------------------------ Carbon ? ------------------------------------ Silicon ?------------------------------- Germanium ? ----------------------------------------- Tin ? ------------------------------------- Lead

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4 2,4 2,8,4 Group 14 Elements The elements at the top

4

2,4

2,8,4

Group 14 Elements

The elements at the top of Group 4 are

non-metals. They bond covalently, i.e. by sharing electrons with another atom.
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The Carbon Family Nonmetal (carbon) 2 metalloids (silicon and germanium) 2

The Carbon Family

Nonmetal (carbon)
2 metalloids (silicon and germanium)
2 metals (tin and

lead)
Each of these elements has four outermost electrons.
Metallic nature of the elements increases from top to bottom.
The elements have less in common physically and chemically than do the members of most other families of elements.
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CARBON It has 6 electrons. Life on Earth would not exist

CARBON

It has 6 electrons.
Life on Earth would not exist without

carbon.
Except for water, most of the compounds in your body contain carbon.
Reactions that occur in the cells in your body are controlled by carbon compounds!
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Example http://www.youtube.com/watch?v=wmC8Dg4n-ZA&feature=channel Carbon powder Carbon Compounds

Example http://www.youtube.com/watch?v=wmC8Dg4n-ZA&feature=channel

Carbon powder Carbon Compounds

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Diamond Carbons are bonded via sp3 hybridization to 4 other carbon

Diamond

Carbons are bonded via sp3 hybridization to 4 other carbon atoms

forming a giant network covalent compound.
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Graphite Carbon atoms are bonded via sp2 hybridization. Carbon atoms form

Graphite

Carbon atoms are bonded via sp2 hybridization.
Carbon atoms form sheets

of six sided rings with p-orbitals perpendicular from plane of ring.
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Fullerenes Buckyballs: spherical Nanotubes: tube shaped Both have very interesting properties

Fullerenes

Buckyballs: spherical
Nanotubes: tube shaped
Both have very interesting properties
Super strong
Conduct

electricity and heat with low resistance
Free radical scavenger
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Buckyballs Carbon atoms bond in units of 60 atoms (C-60) forming

Buckyballs

Carbon atoms bond in units of 60 atoms (C-60) forming a

structure similar to a soccerball with interlocking six sided and five sided rings.
sp2 hybridization
Extra p-orbitals form pi bonds resulting in
Electrical conductivity
Stronger covalent bonds, therefore stronger materials
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Silicon It has 14 electrons. The second most abundant element in

Silicon
It has 14 electrons.
The second most abundant element in Earth’s

crust.
Silicon is found at silicon dioxide in quartz rocks, sand, and glass.
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Silicon is the eighth most common element in the universe by

Silicon is the eighth most common element in the universe by

mass.
Pure silicon is a dark gray solid with the same crystalline structure as diamond. Its chemical and physical properties are similar to this material.
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Example http://www.youtube.com/watch?v=a2aWO5cL410

Example http://www.youtube.com/watch?v=a2aWO5cL410

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Germanium It has 32 electrons. It is a shiny, hard, grayish-white

Germanium

It has 32 electrons.
It is a shiny, hard, grayish-white metalloid in the carbon group.


It is found in soil and plants.
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When it reacts with another substance, it loses one of the

When it reacts with another substance, it loses one of the

4 electrons in its outmost shell, which leaves an empty space known as a positive hole.
The positive hole creates a kind of a positive-charge "trap" that invites another electron to fill it.
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Example http://www.youtube.com/watch?v=osrKWVknkgs

Example http://www.youtube.com/watch?v=osrKWVknkgs

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Tin It has 50 electrons. Tin shows chemical similarity to both

Tin

It has 50 electrons.
Tin shows chemical similarity to both neighboring

elements, germanium and lead.
Tin is a soft, flexible, silvery-white metal.
Tin is mainly applied in various organic substances.
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The organic tin bonds are the most dangerous forms of tin

The organic tin bonds are the most dangerous forms of tin

for humans.
Organic tins can spread through the water systems when adsorbed on sludge particles.
They are known to cause a great deal of harm to aquatic ecosystems, as they are very toxic to fungi and algae.
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Example http://www.youtube.com/watch?v=KJIUuO1b1fQ http://www.youtube.com/watch?v=qEwCPJOP0Mg Tin Metal Tin bonds

Example

http://www.youtube.com/watch?v=KJIUuO1b1fQ
http://www.youtube.com/watch?v=qEwCPJOP0Mg
Tin Metal Tin bonds

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Lead It has 82 electrons. Lead has long been recognized as

Lead
It has 82 electrons.
Lead has long been recognized as a

harmful environmental poison.
Lead is a soft, malleable poor metal.
It is also counted as one of the heavy metals.
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Lead is a poisonous substance to animals. It damages the nervous

Lead is a poisonous substance to animals. It damages the nervous

system and causes brain disorders.
Lead poisoning has been recognized from ancient Rome, ancient Greece, and ancient China.
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Example http://www.youtube.com/watch?v=nK8VZ3Aqwpo&feature=related Pure lead

Example http://www.youtube.com/watch?v=nK8VZ3Aqwpo&feature=related

Pure lead

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Lead poisoning in KZ In 2010, local families switched on their

Lead poisoning in KZ

In 2010, local families switched on their TV

sets and learned that the dilapidated plant was to re-open.
A company called Kazakhmys, the country's largest copper producer of Lead.
Announced at a ceremony in Shymkent to mark the start of the project that it would be running the operation.
The decision was taken that Kazakhmys will itself take on the operational and financial management of the lead smelter in order to avoid losses and make the maximum possible profit, Kazakhmys executive director of metallurgy, Yerzhan Ospanov, told a local TV crew.
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Lead poisoning in KZ There is no acceptable level for lead

Lead poisoning in KZ

There is no acceptable level for lead in

the body, according to the World Health Organisation.
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Lead paint or lead-based paint is paint containing lead. As pigment,

Lead paint or lead-based paint is paint containing lead. As pigment, lead(II) chromate (PbCrO4, "chrome yellow"), Lead(II,IV) oxide, (Pb3O4, "red

lead"), and lead(II) carbonate (PbCO3, "white lead") are the most common forms.
Lead is added to paint to speed up drying, increase durability, maintain a fresh appearance, and resist moisture that causes corrosion.

https://www.youtube.com/watch?v=kDUB_xQkbaU

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Lead in Paints https://www.youtube.com/watch?v=br1acRXJfoY

Lead in Paints

https://www.youtube.com/watch?v=br1acRXJfoY

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Silicon carbide It is a compound of silicon and carbon. It is extremely hard.

Silicon carbide

It is a compound of silicon and carbon.
It

is extremely hard.
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The structures of carbon dioxide and silicon dioxide There is an

The structures of carbon dioxide and silicon dioxide

There is an enormous

difference between the physical properties of carbon dioxide and silicon dioxide (also known as silicon(IV) oxide or silica). Carbon dioxide is a gas whereas silicon dioxide is a hard high-melting solid. The other dioxides in Group 4 are also solids.
This obviously reflects a difference in structure between carbon dioxide and the dioxides of the rest of the Group.
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The structure of carbon dioxide The fact that carbon dioxide is

The structure of carbon dioxide

The fact that carbon dioxide is a

gas means that it must consist of simple molecules. Carbon can form simple molecules with oxygen because it can form double bonds with the oxygen.
None of the other elements in Group 4 form double bonds with oxygen, and so that forces completely different structures on them.
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Carbon Oxygen

Carbon

Oxygen

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The structure of silicon dioxide Silicon doesn't double bond with oxygen.

The structure of silicon dioxide

Silicon doesn't double bond with oxygen.
Silicon atoms

are bigger than carbon. That means that silicon-oxygen bonds will be longer than carbon-oxygen bonds.
This is based on a diamond structure with each of the silicon atoms being bridged to its other four neighbours via an oxygen atom .
This means that silicon dioxide is a giant covalent structure. The strong bonds in three dimensions make it a hard, high melting point solid.
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The acid-base behaviour of the Group 4 oxides The oxides of

The acid-base behaviour of the Group 4 oxides

The oxides of the

elements at the top of Group 4 are acidic, but acidity of the oxides falls as you go down the Group.
An oxide which can show both acidic and basic properties is said to be amphoteric.
The trend is therefore from acidic oxides at the top of the Group towards amphoteric ones at the bottom.

Towards the bottom of the Group, the oxides become more basic - although without ever losing their acidic character completely.

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Properties Group 14

Properties Group 14

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Group work / Stations 1.Each group will make poster for a

Group work / Stations

1.Each group will make poster for a

station .
2. Then all the station will be glue around the class room.
3. Each student will answer the questions individually in the work sheet with the help of the stations made by each group.