Question: Does Reactivity Increase Or Decrease Down A Group?

What makes an element more or less reactive?

The number of electrons in the outermost shell of an atom determines its reactivity.

Noble gases have low reactivity because they have full electron shells.

Alkali metals are highly reactive because they readily lose the single electron in their outermost shell..

How does the reactivity vary in a period?

In NON-METALS reactivity INCREASES as you go ACROSS a Period because the closer you get to fulling your s- and p- orbitals the more motivated you are to do so.

Why is Group 7 so reactive?

Reactivity of group 7 non-metals increases as you go up. Each outer shell contains seven electrons and when group 7 metals react, they will need to gain one outer electron to get a full outer shell of electrons. … This allows an electron to be attracted more readily, making it more reactive as you go up the group.

Why does reactivity decrease down a group?

Reactivity Trends Nonmetal reactivity decreases down a group because the nucleus’ ability to gain more valence electrons weakens due to more nuclear shielding.

Does reactivity increase or decrease down Group 1?

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.

Does reactivity increase or decrease across a period?

Period – reactivity decreases as you go from left to right across a period. The farther to the left and down the periodic chart you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity. Period – reactivity increases as you go from the left to the right across a period.

Why does reactivity increase down Group 2?

Reactivity. Reactivity of Group II elements increases down the group. This can be explained by the increase in ease at losing two outer electrons as we descend the group. The loss of electrons becomes easier due to the decreasing ionisation energy required.

Why is Group 1 more reactive as you go down?

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.

Is Group 1 or 7 more reactive?

As you go down group 1 (the alkali metals) in the periodic table, the elements get more reactive. As you go up group 7 (the halogens), again the elements get more reactive.

What is the least reactive element in Group 7?

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.

Why does pH increase down Group 2?

The pH of the Group 2 hydroxide solution is pH 10-12. 1.3. … The overall trend, for the reactivity of Group 2 metals with water, is an increase down the group. The outer electrons are easier to remove as they are further from the nucleus and there is more shielding resulting in a lower nuclear attraction.

Does reactivity increase or decrease down 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.

What is the least reactive element in Group 1?

lithiumReactivity of Group 1 Elements The reactivity of alkali metals increases from the top to the bottom of the group, so lithium (Li) is the least reactive alkali metal and francium (Fr) is the most reactive.

Is Group 1 or Group 2 more reactive?

The representative elements occur in groups 1, 2, and 12–18. … The outermost electrons of the alkaline earth metals (group 2) are more difficult to remove than the outer electron of the alkali metals, leading to the group 2 metals being less reactive than those in group 1.

Why beryllium does not react with water?

Beryllium (Be) is the only alkaline earth metal that does not react with water. This is due to its small size and high ionization energy in relation to the other elements in the group.