1.4 The elements of group 7

Recall; Review of 1.1 - 1.3

In this Unit, We've looked at the following so far;

• Metals and non metals

• Properties of metals and non metals

• Groups and periods

• Trends / patterns in groups and periods

• Elements of group 1 & their trends

  Answer the following questions to jog your memory on these ideas

Multiple Choice

Which of the following are true of metals?

• Shiny

  Brittle

  Ductile

  Malleable

• Shiny

  Ductile

  Malleable

  Good conductors

Multiple Choice

Which of the following is not true of metals?

• They are good insulators

• They are malleable

• They are ductile

• They are malleable

• They are shiny

Multiple Choice

Metals are shiny because

• Light energy falling on them is emitted by excited electrons

• The surface is soft

• Light energy is used to make soft electrons

• Energy is reflected on the surface

Multiple Choice

Metals are good conductors of heat because

• There's a free flow of electrons, which vibrate when heated, increasing temperature

• The material is a good conductor

• There are so many electrons that move away when heated

• When heated, the electrons shrink to create space for the heat to be transferred

Multiple Choice

Metals are good conductors of electricity because

• Free electrons in the metal can be repelled easily by new electrons entering the metal

• The material is a good conductor

• There are so many electrons that vibrate to conduct a current

• When the switch is connected, the electrons jump up and down to easily.

Multiple Select

Malleable means; (Select 3 answers)

• Ability to deform in response to an applied force

• Change shape when pressed / hammered

• Ability to be hammered without breaking / cracking

• Ability to reform / rejoin / regain shape after breaking / cracking

Multiple Choice

Metals are malleable because;

• the mobile sea of electrons shields the ions from each other

• the mobile sea of electrons opposes the applied force

• Metals are already strong to outside forces

• the mobile sea of electrons cancels out the applied force

Multiple Choice

Metals are "ductile" because

• the mobile sea of electrons shields the ions from each other

• the mobile sea of electrons can be stretched

• metals are made to be used in wiring

Multiple Choice

Page 61;

Elements who's properties are between those of metals and non metals are known as

• metalloids

• metallica

• half metals

• near metals

Multiple Choice

Approximately what percentage of the periodic table is comprised of metals?

• 20 %

• 50 %

• 80 %

• 99 %

Multiple Choice

The name given to vertical columns in a periodic table is;

• Groups

• Periods

• Compounds

• Bases

Multiple Choice

What is the difference between groups and periods in the periodic table?

• Groups are vertical columns, Periods are horizontal rows.

• Periods are vertical columns, periods are Groups rows.

Multiple Choice

Page

How many periods are in the periodic table?

• 4

• 5

• 6

• 7

Multiple Select

Page 64; (Look at the table)

Which of the following are group 1 metals?

• Lithium

• Copper

• Platinum

• Sodium

• Rubidium

Multiple Choice

Page 64;

Which of the following group 1 metals is used in making salt?

• Lithium (Li)

• Sodium (Na)

• Potassium (K)

• Rubidium (Rb)

Multiple Select

Which of the following properties increase down the group for group 1 elements?

• Melting point

• Density

• Softness

• Boiling point

• Reactivity

Multiple Select

Which of the following properties decrease down the group for group 1 elements?

• Melting point

• Density

• Softness

• Boiling point

• Reactivity

Multiple Choice

Page 64; TRUE or FALSE;

All group 1 elements have exciting reactions with water

• TRUE

• FALSE

Multiple Choice

Which gas is formed when group 1 elements react with water?

• Oxygen

• Helium

• Hydrogen

• Neon

Multiple Choice

Group 1 elements are also known as

• Noble gas

• Halogen

• Alkaline earth metals

• Alkali metals

Multiple Select

Select the properties of the Group 1 elements. (3 answers)

• Silvery solids

• Very hard metals

• Very soft metals

• High density

• Low density

Multiple Choice

Where are Group 1 elements on the Periodic Table?

• Far right

• Far left

• In the middle

• Top, horizontal row

1.4 The elements of group 7

Lesson objectives; At the end of this lesson you should be able to;

• Use patterns to predict properties of group 7 elements

• Describe displacement reactions

Use pages 66-67 of your textbook to complete this lesson worksheet.

Video; Group 7 - The Halogens | Properties of Matter | Chemistry | FuseSchool

Multiple Select

Today's learning objectives are;

• Use patterns to predict properties of group 7 elements

• Describe displacement reactions

• Use pages 66-67 of your textbook to complete this lesson worksheet

• The elements of group 7

• Use patterns to predict properties of group 1 elements

Multiple Choice

Page 66; Which element makes tap / swimming pool water smell the way it does?

• Carbon

• Chlorine

• Calcium

• Cesium

Multiple Choice

How does Chlorine make water safe to drink?

• .....tiny amounts destroy deadly bacteria

• .......flavors the water

• ......gives the water and attractive blue color

• ......gives the water a nice smell/aroma

Multiple Choice

Which of these is not a use of chlorine? (Google)

• Disinfect water

• Used in production of paper

• Used in bleaching products (to remove stains)

• Used to clean metal

Multiple Select

Page 66; The other elements of the group are _________

• Fluorine

• Bromine

• Iodine

• Astatine

• Chlorine

Multiple Choice

Match the group 7 element to its symbol;

Chlorine →→→→→→ _____

• F

• Cl

• Br

• I

• At

Multiple Choice

Match the group 7 element to its symbol;

Fluorine →→→→→→ _____

• F

• Cl

• Br

• I

• At

Multiple Choice

Match the group 7 element to its symbol;

Bromine →→→→→→ _____

• F

• Cl

• Br

• I

• At

Multiple Choice

Match the group 7 element to its symbol;

Iodine →→→→→→ _____

• F

• Cl

• Br

• I

• At

Multiple Choice

Match the group 7 element to its symbol;

Astatine →→→→→→ _____

• F

• Cl

• Br

• I

• At

Multiple Choice

Group 7 elements are on the ______ of the stepped line so that means that they are ______

• left, metals

• left, non-metals

• right, metals

• right, non-metals

Multiple Select

Group 7 elements are;

• Halogens

• Non-metals

Multiple Select

Page 66; Which of the following is true of group 7 elements?

• They are halogens

• They are non-metals

• They have low melting points

• They do not conduct electricity

• They are brittle solids at room temperature

Multiple Choice

Look at the table on page 66;

What is the state of each of these group 7elements at room temperature?

Fluorine →→→

• Gas at room temperature

• Liquid at room temperature

• Solid at room temperature

• Plasma at room temperature

Multiple Choice

Look at the table on page 66;

What is the state of each of these group 7elements at room temperature?

Chlorine →→→

• Gas at room temperature

• Liquid at room temperature

• Solid at room temperature

• Plasma at room temperature

Multiple Choice

Look at the table on page 66;

What is the state of each of these group 7elements at room temperature?

Bromine →→→

• Gas at room temperature

• Liquid at room temperature

• Solid at room temperature

• Plasma at room temperature

Multiple Choice

Look at the table on page 66;

What is the state of each of these group 7elements at room temperature?

Iodine →→→

• Gas at room temperature

• Liquid at room temperature

• Solid at room temperature

• Plasma at room temperature

Multiple Choice

Look at the table on page 66;

What is the state of each of these group 7elements at room temperature?

Astatine →→→ (google this one)

• Gas at room temperature

• Liquid at room temperature

• Solid at room temperature

• Plasma at room temperature

Multiple Select

Research; Look up "uses of group 7 elements"

Which of the the group 1 elements are often used as disinfectants for purifying water, swimming pools, sterilizing surfaces.? (3 answers)

• Fluoride

• Chlorine

• Bromine

• Iodine

• Astatine

Multiple Select

Research; Look up "uses of group 7 elements"

Which of the the group 1 elements are found in Halogen lamps in small amounts? (2 answers)

• Fluoride

• Chlorine

• Bromine

• Iodine

• Astatine

Multiple Choice

Research; Look up "uses of group 7 elements"

Which of the the group 1 elements are used in toothpaste, baby formula, and vitamin supplements?

• Fluoride

• Chlorine

• Bromine

• Iodine

• Astatine

Multiple Choice

Research;

Which of the the group 7 elements are radioactive?

• Fluoride

• Chlorine

• Bromine

• Iodine

• Astatine

Multiple Choice

Page 66; Look at the table on the bottom of the page;

From this table, we can conclude that the melting point of group 7 elements ________ down the group

• Increases

• Decreases

Multiple Choice

Page 66; Look at the table on the bottom of the page;

From this table, we can conclude that the boiling point of group 7 elements ________ down the group

• Increases

• Decreases

Multiple Choice

Recall; The boiling point of group 1 elements ________ down the group

• Increases

• Decreases

Multiple Choice

Recall; The melting point of group 1 elements ________ down the group

• Increases

• Decreases

Multiple Choice

Page 67;

In group 7, the colours of the elements get ______ from top to bottom

• darker

• lighter

Multiple Choice

TRUE or FALSE

All group 7 elements are reactive

• TRUE

• FALSE

Multiple Choice

All group 7 elements react with;

• Iron

• Copper

• Aluminum

• Bromine

Multiple Choice

Page 67; Which of these group 7 elements reacts vigorously with iron?

• Fluorine

• Chlorine

• Bromine

• Iodine

• Astatine

Multiple Choice

Page 67;

The reactions of group 7 elements get _____ vigorous down the group

• More

• Less

Multiple Choice

Recall; The reactions of group 1 elements get _____ vigorous down the group

• More

• Less

Multiple Choice

Compare group 1 & group 7;

In group 1, the reactivity ______ down the group, but in group 7, the reactivity _____ down the group

• Increases, decreases

• Decreases, increases

Multiple Choice

Compare group 1 & group 7;

In group 1, the melting point ______ down the group, but in group 7, the melting point _____ down the group

• Increases, decreases

• Decreases, increases

Multiple Choice

Compare group 1 & group 7;

In group 1, the boiling point ______ down the group, but in group 7, the boiling point _____ down the group

• Increases, decreases

• Decreases, increases

Multiple Choice

Page 67; True or false

Elements nearer the top of group 7 displace elements lower in the group from their compounds;

• TRUE

• FALSE

Multiple Choice

A chemical reaction in which a more reactive element displaces a less reactive element from its compound is called a __________

• Displacement reaction

• Substitution reaction

• Replacement reaction

• Switching reaction

Multiple Choice

How many electrons does Cl contain? (click to see image)

• 17

• 28

• 35.45

• 3