What is the order of reactivity of alkali metals?
Li.
Why are alkali metals reactive GCSE?
The elements in the first column of the Periodic Table (lithium, sodium, potassium and so on) all have one electron in their outer electron shell. This means that they share similar properties and behave similarly in chemical reactions.
Why does the reactivity of alkali metals decrease down the group?
the outer electron gets further from the nucleus as you go down the group. the attraction between the nucleus and outer electron gets weaker as you go down the group – so the electron is more easily lost.
Why do group 1 metals get more reactive as you go down?
The reactivity of Group 1 elements increases as you go down the group because: the atoms get larger as you go down the group. the outer electron gets further from the nucleus as you go down the group.
Why does reactivity increase down group 1 but decrease 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.
Why do group 1 metals increase in reactivity as you go down the group?
The reactivity of group 1 elements increases as you go down the group because: the atoms become larger. the outer electron becomes further from the nucleus. the force of attraction between the nucleus and the outer electron decreases.
Why do alkali metals get more reactive?
Alkali metals from lithium to potassium get more reactive because the force of attraction between the nucleus (core) and the outer electron gets weaker as you go down group 1 elements.
How do you arrange metals in order of reactivity?
The order of reactivity of metals is as follows, Potassium > Sodium > Lithium > Calcium > Magnesium > Aluminium > Zinc > Iron > Copper > Silver > Gold.
How do you determine the order of reactivity of metals?
In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom. More reactive metals have a greater tendency to lose electrons and form positive ions .
Why does reactivity increase down group 1 but decrease down Group 17?
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.