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it is the most reactive non-metals

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halogens

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The last element in the group is radioactive

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Fluorine

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flourine

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All the elements in Group VII have 7 valence electrons

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the colour turns darker.
melting and boiling point increases.
turns from gas to solid.

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halogens

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The halogen group of elements is the most reactive of the nonmetals. It is also the most reactive group of all chemical elements. Fluorine is the most reactive element in this group.

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halogens

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fluorine

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A more reactive halogen can displace a less reactive halogen from its salt dissolved in water.

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Both Melting points and Boiling points increase

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Fluorine

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Halogen

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very high electronegativities

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it is mainly gas

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halogen

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fluorine

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Fluorine

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Typing...

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halogens

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halogens

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fluorine

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halogens

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halogens

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halogens

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low melting and boiling points increases

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as we go down the group:
melting and boiling points increase

colour becomes darker

reactivity decreases

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fluorine (F)

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group VII are also known as halogens

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What is halogen displacement reaction ? Give an example.

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Write down a pattern in the physical properties that occurs down the group.

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State one general physical property of Group VII elements?

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Which is the most reactive non-metallic element found in Group VII?

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What is a common name for group VII elements?

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Answer the following questions about Group VII elements
https://www.youtube.com/watch?v=yW_C10cEzMk

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Other interesting points about group I metals

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Other interesting points about group I metals

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Hydrogen gas

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reactivity increase as you go down the periodic table

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All the alkali metals react vigorously with cold water. In each reaction, hydrogen gas is given off and the metal hydroxide is produced. The speed and violence of the reaction increases as you go down the group

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It ignites itself and moves from different direction.

As time goes by, the metal will explode!

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Greater than 7

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The Group 1 elements in the periodic table are known as the alkali metals. They include lithium, sodium and potassium, which all react vigorously with water to produce an alkaline solution.

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their melting points decrease, their densities increase, they become softer, they become more reactive

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more  than 7

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pH value greater than 7

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metal is oxidized to its metal ion and water is reduced to form hydrogen gas and hydroxide ions. The general reaction of an alkali metal (M) with H2O (l) is given in the following equation:

2M(s)+2H2O(l)⟶2M+(aq)+2OH−(aq)+H2(g)

http://chem.libretexts.org/Core/Inorganic_Chemistry/Descriptive_Chemistry/Main_Group_Reactions/Reactions_of_Main_Group_Elements_with_Water

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the pH is 7 and above

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they form oxides and hydroxides that dissolve in water to give alkaline solutions and the alkaline hydroxide is formed when the metals react with water.

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Lithium(Li) is the softest compare to others and Francium(Fr) is much more reactive than others.

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The hydrogen ignites immediately during the reaction between potassium and waterwith the potassium producing a lilac coloured flame.

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group 1 metal all alkali,

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caesium is more reactive in water than potassium

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Having a pH greater than 7

When heated strongly in a flame, the Alkali metals or their compounds give bright colours.

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The trend is from the reactivity of the metals down the row.

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decreasing in the melting point and the boiling point, density increases, elements become more and more reactive,

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1.atoms of the elements in group 1 valence electrons(credits to norin)
2.trend down the group the density of the elements increase down the group
the melting point and boiling points decrease down the group

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The alkali metals have low melting and boiling points compared to most other metals.
more info: http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_pre_2011/periodic_table/group1rev2.shtml

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The alkali metals is vey soft.

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it have low boiling point and low melting point.it is soft

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when alkali metals react with water, it produces an alkaline solution:

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low boiling and melting point

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shiny

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the densities of alkali metals generally increase

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Compared to Group I and Group II metal, Group I metal is more reactive compared to Group II.
This shows that Group I metals are pure.

Group I metals are soft and reactive.

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group 1 metal is usually
soft and reactive.

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all the elements in group I have 1 valence electrons

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low melting and boiling points
decrease as we go down group I

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Typing...

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State a trend in properties of Group I elements down the group.

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What are the products form when the alkali metals  react  cold water?

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What is the pH range of the solution formed from Group I metal reacts with water?

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State one general physical property of Group I metal.

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Watch the video by the clicking the link below. Quickly write down what you have learnt.
https://www.youtube.com/watch?v=JAPWCJEo9Iw

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

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Elements in the same period have the same number of electron shells; moving across a period elements gain electrons and protons and become less metallic. This arrangement reflects the periodic recurrence of similar properties as the atomic number increases.

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as we move across a period,the metallic character decreases.

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Elements in the same group in the periodic table have similar chemical properties. This is because their atoms have the same number of electrons in the highest occupied energy level. Group 1 elements are reactive metals called the alkali metals. Group 0 elements are unreactive non-metals called the noble gases.

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A group is a vertical column of elements.In the periodic table,elements in the same group in the periodic table have similar chemical properties

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Elements in the same period have the same number of electron shells; moving across a period (so progressing from group to group), elements gain electrons and protons and become less metallic. This arrangement reflects the periodic recurrence of similar properties as the atomic number increases.

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as we mve across a period element changes from metal to non-metal.

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Elements in the same group number share the same number of valence electrons

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Elements in the same group in the periodic table have similar chemical properties. This is because their atoms have the same number of electrons in the highest occupied energy level.

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https://www.youtube.com/watch?v=-f-IR05cudY

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Melting points and boiling points show periodic properties. This means that they vary in a regular way or pattern depending on their position in the periodic table.

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A period is a horizontal row in the periodic table. Although groups generally have more significant periodic trends, there are regions where horizontal trends are more significant than vertical group trends, such as the f-block, where the lanthanides and actinides form two substantial horizontal series of elements.[20]

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alkali:soft , low density metals
low melting point and boiling
good electrical conductors