What periodic trend is most important for determining metal reactivity?

What periodic trend is most important for determining metal reactivity?

Metallic and Non-metallic Character Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities. By following the trend summary in the figure below, you can see that the most reactive metals would reside in the lower left portion of the periodic table.

What happens to reactivity down a group?

As we go down the group, the atom gets bigger. The bigger the atom, the further away the last electron. Therefore, the attraction between the nucleus and the last electron gets weaker. This makes it easier for the atom to give up the electron which increases its reactivity.

Why does reactivity increase up Group 7?

Trend in Reactivity of Group 7: This means that the outer electrons are closer to the nucleus so there are stronger electrostatic forces of attraction that attracts the extra electron needed. This allows an electron to be attracted more readily, making it more reactive as you go up the group.

What happens to the reactivity of 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 halogens become less reactive 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.

Can you explain the trend in reactivity in Group 7?

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.

Is Group 16 on the periodic table reactive?

Group 16 of the periodic table is also called the oxygen group. The first three elements—oxygen (O), sulfur (S), and selenium (Se)—are nonmetals. All group 16 elements have six valence electrons and are very reactive.