What is the trend in the reactivity of the halogens?
Table of Contents
- 1 What is the trend in the reactivity of the halogens?
- 2 What is the trend in the halogen family?
- 3 How does the reactivity of the halogens vary within its own group from top to bottom?
- 4 Why does reactivity of halogens decrease down the group?
- 5 Why does the reactivity of halogens decrease GCSE?
- 6 Why do halogens get more reactive going up the group?
- 7 Why does reactivity of halogens decrease?
- 8 Why do reactivity of halogens decrease down the group?
What is the trend in the reactivity of the halogens?
The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group. This is the opposite trend to that seen in the alkali metals in Group 1 of the periodic table . Fluorine is the most reactive element of all in Group 7.
What is the trend in the halogen family?
Halogens show very smooth variations in their physical properties. Fluorine and chlorine are in the gaseous state, bromine in liquid and iodine in the solid state. The melting and boiling point of halogens increases with increase in the atomic number of the element. All the members of the halogen family are coloured.
Why do halogens increase in reactivity up the group?
The halogens are located on the left of the noble gases on the periodic table. Because the halogen elements have seven valence electrons, they only require one additional electron to form a full octet. This characteristic makes them more reactive than other non-metal groups.
How does the reactivity of the halogens vary within its own group from top to bottom?
The halogens are among the most reactive of all elements, although reactivity declines from the top to the bottom of the halogen group. Because all halogens have seven valence electrons, they are “eager” to gain one more electron. Alkali metals have just one valence electron, which they are equally “eager” to donate.
Why does reactivity of halogens decrease down the group?
The reactivities of the halogens decrease down the group ( At < I < Br < Cl < F). This is due to the fact that atomic radius increases in size with an increase of electronic energy levels. This lessens the attraction for valence electrons of other atoms, decreasing reactivity.
What is the trend in properties physical state of the halogen group as you go from top to bottom?
From the lowest boiling and melting point to the highest, the group in order is fluorine, chlorine, bromine, iodine and astatine. As you move down the group the halogens become darker in colour. For example fluorine is a very pale yellow whereas iodine will be dark purple in colour when it is in a vapour state.
Why does the reactivity of halogens decrease GCSE?
The reactivity of Group 7 elements decreases down the group. The electrons in the outer shell move further away from the nucleus as we go down the group and the attraction force between the electrons and the nucleus become weaker and weaker. This weaker attraction in the larger atoms makes it harder to gain electron.
Why do halogens get more reactive going up the group?
Why do halogens get more reactive going upwards in group 7? Halogens from bromide to fluorine get more reactive because the force of attraction between the nucleus (core) and the outer electron get stronger as you go up group 7 elements. As you go up group 7 (the halogens), again the elements get more reactive.
How does the reactivity of the halogens change going down Group 7?
Reactivity decreases down the group. This is because group 7 elements react by gaining an electron. As you move down the group, the amount of electron shielding increases, meaning that the electron is less attracted to the nucleus.