jonka Jonathan Mangar - Marvin Heights PS (1110) 4 vuotta sitten
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Periodic Table Trends
The alkaline earth metals, found in the periodic table, are characterized by low melting and boiling points, as well as low densities. These metals are key ingredients in fireworks due to their reactive nature.
Which group would you expect to be more reactive: Group 16, Group 17, or Group 18 elements? Explain your reasoning.
Group 17 because the halogen elements have seven valence electrons, they only require one extra electron to form a full group. This characteristic makes them more reactive than other non-metal groups
Would you expect Al to be more reactive than Mg. Justify your answer.
No i would not be surprised If aluminum was more reactive than Magnesium. Magnesium is more reactive the aluminum
How would chemical reactivity affect how one might extract sodium and potassium metals?
They would use different method to extract the metals.
Metals more reactive than carbon, such as aluminium, are extracted by electrolysis(Electric Current)
Transition Metals
why are the transition metals so reactive to water and oxygen
Transition metals do not react as quickly with water or oxygen so do not corrode as quickly.
What we use Transition Metals for?
Tools and Vehicles
Great strength
High densities
High hardness
They`re shiny when freshly cut
They can conduct electricity in Liquid state
They can conduct Electricity in solid state
Alkali Metal
why are the alkali metals so reactive to water and oxygen
Alkali metals are also known to react violently and explosively with water. This is because enough heat is given off during the Combustion reaction to ignite the H2(g) (Hydrogen).
the melting point of the alkali metals decreases down the group. This is because as the ions get larger the distance between the bonding electrons and the positive nucleus gets larger and reduces the overall attraction between the two
What we use Alkali metal for?
Table salt, atomic clocks and etc.
readily lose their outermost electron to form cations with a charge of +1
Highly Reactive at standard pressure
Highly reactive at standard temperature
Silvery
Non - metals
What we use non - metals for?
Fertilizers
Poor conductors of heat
More reactive with metal more than non metals
Not reactive with air in room temperature room
Not lustrous
Brittle solids
Not sonorous
Metalloids
What we use metalloids for?
Electronics and etc
Electron Affinity
electronegativity
High ionization
Good conductors
Brittle
THIS GOES FOR ALL THE ELEMENTS
The melting points decrease down the group because the metallic bonds are weaker for the larger elements. The atoms in a metal are held together by the attraction between the nuclei and the delocalized electrons.
Halogens
What we use Halogens?
Dishes and etc.
Denser as you go down the table
High in toxicity
Very reactive
Physical properties
Low melting point
Density of liquid at specific temperature
Colour - Pale yellow gas
Alkaline earth Metals
Describe the relationship observed for radius of the atom and melting points as you move around the periodic table
When going down the periodic table the elements with
a higher atomic number it will be easier