Please enable JavaScript.
Coggle requires JavaScript to display documents.
Physical and chemical trends of elements in Group 1 and 17 (Group 17…
Physical and chemical trends of elements in Group 1 and 17
Group 17
Iodine
Density 4.933 g cm-3
Atomic number is 53
The boiling point is 184.4°C
Brown in water, purple in organic material
Melting point is 113.7°C
Required to prevent goiter(thyroid illness)
TRENDS IN GROUP 17
The colour of the elements grows darker down the group
Atomic radius and atomic number grows increases the group
Electronegativity decreases down the group
Melting point increases down the group
Chlorine
Atomic number is 17
The melting point is −101.5°C
The boiling point is −34.04°C
The density is 0.002898 g cm−3
A very reactive element
Chlorine gas is very toxic
Chlorine gas reacts with aluminium to produce aluminium trichloride. The reaction is very intense
Fluorine
Thee most reactive element
Has the highest electronegativity
Atomic number is 9
The melting point is −219.67°C
The boiling point is −188.11°C
Have a density of 0.001553 g cm-3
It burns right through iron wool and produces iron fluoride.
Bromine
The melting point is −7.2°C
The boiling point is 58.8°C
Atomic number is 35
The density is 3.1028 g cm-3
Bromine gas is toxic
Can be oxidised by aluminium and produce aluminium tribromide.The reaction is strongly exothermic.
Astatine
Very radioactive that is decomposes too quickly preventing further research
Atomic number is 85
Density is unknown
Melting point is 300°C
Boiling point is 350°C
Tennessine
Atomic number is 117
Density is unknown
Melting point is unknown
Boiling point is unknown
Tennessine is harder to do research upon as it is also very radioactive and that even 2 atoms cannot form at the same time
Group 1
Sodium
The boiling point is also the second highest which is
882.9 degree celcius
The melting point is the second highest in group 1 which is
97.79 degree celcius
It react more vigorous compared to Lithium atom when react with water but less reactive compared to other element in Group 1
The electropositivity is the the
second lowest
as it has bigger atomic radius compared to Lithium and Sodium
Potassium
The boiling point is also the third highest which is
758.8 degree celcius
The electropositivity is the the third lowest as it has bigger atomic radius compared to Lithium and Sodium
The melting point is the third highest in group 1 which is
63.38 degree celcius
It is more reactive compared to Lithiumand Sodium atom but less reactive than Rubidium, Caesium and Francium
Lithium
The melting point is the
highest
in group 1 which is
180.5 degree celcius
The boiling point is also the
highest
which is
1342 degree celcius
The electropositivity is the the
lowest
as it has the
smallest atomic radius
It is the
least reactive metal
in group 1 as its tendency to remove electron is also the least
Rubidium
The boiling point is also the fourth highest which is
687.7 degree celcius
The electropositivity is the the fourth lowest as it has bigger atomic radius compared to Lithium, Sodium and Potassium
The melting point is the fourth highest in group 1 which is
39.30 degree celcius
as its atomic radius is the second largest in this group.
It is more reactive compared to Lithium Sodium and Potassium atom but less reactive than Caesium and Francium
Caesium
The boiling point is also the fifth highest which is
670.8 degree celcius
The electropositivity is the the second highest as it has bigger atomic radius compared to Lithium and Sodium
The melting point is the fifth highest in group 1 which is
28.44 degree celcius
as its atomic radius is the second largest in this group
It is more reactive compared to Lithium, Sodium,Potassium and Rubidiumatom but less reactive than Caesium and Francium
TRENDS IN GROUP 1
Boiling point
Going down the Group 1, the boiling point
decreases
because less heat energy is needed to break the force of attraction
Electropositivity
Going down the Group 1, the electropositivity
increases
because as the atomic radius increases, the attraction between the nucleus and the valance electron decreases. therefore the tendency to lose electron increases
Atomic number and radius
Going down the Group 1, the atomic number
increases
and the atomic radius also
increases
Reactivity
Going down the Group 1, the reactivity
increases
as the electropositivity increases thus increase the tendency to react with other elements
Melting point
Going down the Group 1, the melting point
decreases
because the force of attraction decreases
Francium
The boiling point is also the sixth highest which is
676.8 degree celcius
The electropositivity is the the highest as it has the biggest atomic radius compared to other elements in this group
The melting point is the sixth highest which is also the lowest in group 1 which is
27 degree celcius
as its atomic radius is the second largest in this group
It is the most reactive metal in this group
HOW THIS APPLICATION CAN BE USED IN HELPING STUDENTS IN UNDERSTANDING THE TRANDS IN PERIODICITY?
SO FUN
ZAFIER HENSEM
The layout of the information is interactive and provides a vast amounnt of information. The table the extra information were put in makes it easier to view and the video gives a better picture of the elements and how they react to ceratain conditions or other elements
IFFAH.
We could see the reactivity of the element one by one clearly from the video and at the same time try to relate with their properties such as the atomic radius.