1.3 The elements of group 1

Lesson 1.3;

The elements of group 1

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

• Interpret data to describe patterns in properties of the group 1 elements.

• Use patterns to predict properties of group 1 elements.

Multiple Select

Today's lesson objectives are; (2 answers)

• Use patterns to predict properties of elements

• Compare patterns in properties in the groups and periods of the periodic table

• Interpret data to describe patterns in properties of the group 1 elements

• Use patterns to predict properties of group 1 elements

Recap

Let's review some ideas from the past two lessons;

Multiple Select

Plants, bugs, birds, fish, bacteria and men are mostly ______, _______, _______ and ________

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

• Helium

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

Some students conducted a laboratory investigation to learn more about the physical properties of different elements. They observed four samples and recorded their observations in the table . Based on these observations, which sample is most likely a nonmetal?

• Sample 1

• Sample 2

• Sample 3

• Sample 4

Multiple Choice

How would this element be classified?

• Metal

• Nonmetal

• Metalloid

• Metamorphic

Multiple Choice

From the table, Element Z is a ________

• Metal

• Non-metal

• Metalloid

Multiple Choice

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

• Groups

• Periods

• Compounds

• Bases

Multiple Choice

Recall;

What does 'density' mean?

• The temperature at which a solid melts / turns to liquid

• The temperature at which a liquid boils / turn to vapor

• The amount of space occupied by an object

• How much mass something has for its volume

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

Poll

I know this for sure! - so far..

• Columns = Groups

  Rows = Periods

• Metals = alkaline solutions

  Non metals = Acidic solutions

• In the columns (groups), Melting point increases down the group

• In the rows (periods), melting point increases for the first four elements

1.3 The elements of group 1

Use pages 64-65 to complete the rest of this lesson worksheet.

Lesson video; https://youtu.be/CmiitvJiCPc

Labs next week and the week after.

Multiple Choice

Page 64;

Lithium is in group ___ of the periodic table;

• 1

• 2

• 3

• 4

Multiple Choice

Group 1 elements are;

• Metals

• Non-Metals

Multiple Choice

Group 1 elements are metals that are;

• Soft and easy to cut

• Hard and difficult to cut

Multiple Choice

The softness of group 1 metals;

• Increases down the group (they get softer)

• Decreases down he group (they get harder)

Multiple Select

Group 1 elements are; (2 answers)

• ..good conductors of heat

• ..shiny when freshly cut

• ..brittle and break easily

• ..not sonorous

Multiple Choice

How are group 1 elements different from other metals?

• They have higher melting points

• They have lower melting points

Multiple Select

Page 64; (Look at the table)

Which of the following are group 1 metals?

• Lithium

• Copper

• Platinum

• Sodium

• Rubidium

Multiple Choice

TRUE of FALSE;

The melting point of group 1 elements increases down the group

• TRUE

• FALSE

Multiple Choice

In group 1, the element at the top of the group has a(n) _____ melting point ___ the element at the bottom of the group

• higher, than

• lower, than

• equal, to

Multiple Choice

The image shows the densities of group one elements.

Which of the following is the most correct description for the bar chart?

• Overall, density decreases down the group

• Overall, density increases down the group

• Overall, density decreases down the group except for potassium

• Overall, density increases down the group except for potassium

Multiple Choice

Page 64;

Which of the following group 1 metals is a coolant used in nuclear power stations?

• Lithium (Li)

• Sodium (Na)

• Potassium (K)

• Rubidium (Rb)

Multiple Choice

Page 64;

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

• Lithium (Li)

• Sodium (Na)

• Potassium (K)

• Rubidium (Rb)

Patterns / trends of group 1 metals

Let's explore how these properties of group 1 metals change as you go down the group;

• Melting point - Decreases down the group

• Density - Increases down the group

• Softness - increases down the group (easier to cut)

• Boiling point - decreases down the group

• Reactivity - increases down the group

Multiple Choice

TRUE or FALSE?

Melting point - Increases down the group

• TRUE

• FALSE

Multiple Choice

TRUE or FALSE?

Density - Increases down the group

• TRUE

• FALSE

Multiple Choice

TRUE or FALSE?

Softness - Decreases down the group (harder to cut)

• TRUE

• FALSE

Multiple Choice

TRUE or FALSE?

Boiling point - Decreases down the group

• TRUE

• FALSE

Multiple Choice

TRUE or FALSE?

Reactivity - Increases down the group

• TRUE

• FALSE

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

What happens to the melting point as you move down group 1?

• Increases

• Decreases

• Stays the same

Multiple Choice

What happens to the boiling point as you move down group 1?

• Increases

• Decreases

• Stays the same

Multiple Choice

Page 64;

Group 1 elements are very reactive. This means;

• They explode easily

• They easily take part in physical reactions

• They easily take part in chemical reactions

Multiple Choice

Page 64;

Group 1 elements are known to easily take part in chemical reactions, this menas they are....

• very reactive

• very active

• very metallic

• very explosive

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

Page 64;

What do you observe when you place a group 1 element in the water?

• The element sinks in the water

• The element immediately dissolves in the water

• Hydrogen gas moves the element around on the water

• An explosion happens

Multiple Choice

Recall; Alkaline solutions are formed when _____ react with water

• metals

• non-metals

Multiple Choice

Recall; Alkaline solutions are formed when _____ react with water

• metals

• non-metals

Multiple Choice

Recall; When non-metals react with water, they form _____

• alkaline solutions

• acidic solutions

Multiple Choice

Page 64;

Which color does the universal indicator turn when testing for alkaline solutions?

• Green

• Orange

• Purple

• Pink

Multiple Choice

Page 64;

There is a pattern in the reactions. They all produce _____ and _______

• hydrogen

• a metal oxide

• hydrogen and a metal oxide

• hydrogen and alkaline solutions

Multiple Select

Page 64;

There is a pattern in the reactions. They all produce _____ and _______

• hydrogen

• a metal oxide

• oxygen

• acidic solutions

Multiple Choice

In group 1, the reactions get more vigorous down the group

• TRUE

• FALSE

Multiple Choice

Based on the graph, what is the trend of the hardness of group 1 elements?

• decreases down the group

• increases down the group

Multiple Select

Based on the graph, which of the following are correct predictions for the hardness of Potassium? (3 answers)

• 0.065

• 0.025

• 0.040

• 0.035

• 0.045

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 Select

Sodium is less reactive than which Group 1 elements? (3 answers)

• Lithium

• Potassium

• Rubidium

• Caesium

Multiple Select

Potassium has a lower boiling point than which Group 1 elements? (2 answers)

• Lithium

• Sodium

• Rubidium

• Caesium

Multiple Choice

Where are Group 1 elements on the Periodic Table?

• Far right

• Far left

• In the middle

• Top, horizontal row