How does the reactivity of group 1 and 7 elements change as they move down their groups and why?

Answer 1

It decreases. This is because each period (row) you go down, the element has more shells. The more shells the less effective the positive nucleus is at attracting other negative atoms to bond with and gain an electron. It is made harder to attract because there is an increasingly bigger field of negative electrons in the way.

Answer 2

They get more reactive as they go up because a more reactive group 7 element will puch out (displacement reactions) a less reactive one when they are reacting with another elements espically group 1 metals because halogens only need one eletron to make them stable.Moving down the group, ionic radius increases and the attraction the halide nucleus has for valance electrons decreases - because of the greater distance reducing the amount of electrostatic attraction between nucleus and electron, and because fo greater electron shielding from core electrons.

Answer 3

Group 1 elements are reactive if they have low electronegativity, or easily give up their electrons to become cations,

Group 7 elements are reactive if they have high electronegativity, or easily take up other electrons to become anions

As you go down each row, electronegativity goes down due to the electron shielding effect of core electrons. lower electronegativity is more reactive for cations like group 1, but less reactive for anions like group 7

Answer 4

It is more reactive as you go up the group, this is because as you go up the group the electronegativity increases and therefore it's more reactive due to this property.

Answer 5

your mum and chemistry