Why does reactivity decrease down the group?
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 does reactivity of nonmetals increase up a group?
Reactivity of non-metals depends on the tendency to gain electrons. As we move down the group, the tendency to gain electrons decreases because as the atomic size increases, the effective nuclear charge decreases. Was this answer helpful?
What happens to reactivity of metals and non-metals respectively down the group?
Metal reactivity decreases from left to right across periods and increases down groups. nonmetallic characteristics increases from left to right and decreases down groups. Nonmetal reactivity increases from left to right and decreases down groups.
Does reactivity decrease or increase down a group?
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. Group - reactivity decreases as you go down the group.
How does the reactivity of non metals change in a group and a period?
The reactivity of non – metals increases from left to right in a period whereas reactivity decreases in a group as we go down the group because the tendency to accept electrons decreases down the group.
Why are smaller nonmetals more reactive?
Reactivity of Non- Metals The smaller atom/s can gain the valence electron/s more easily than the bigger atom/s as the force of attraction between the nucleus and valence electrons of smaller atom/s is more than that of the bigger atoms.
How does the chemical reactivity of non-metal vary as we move down in a group of modern periodic table explain?
When we move from top to bottom in a group of non-metal, the atomic size increases gradually. Hence, nuclear attraction for incoming electrons decreases. As a result, the tendency of non-metallic atoms to gain electrons decreases. Therefore, chemical reactivity of non-metals decreases on moving down in a group.
How do the reactivity of metals vary down a group explain your answer?
Solution : On moving down the group, the number of occupied shells, increases and the effective nuclear charge experienced by,valence electrons decreases because the outermost electrons are, farther away from the nucleus. Thus, these can be lost easily. Hence, metallic character increases down a group.
What happens to the reactivity of nonmetals within a group from the top of the group to the bottom?
The reactivity of non metals decreases from top of the group to the bottom. The distance between the nucleus and the free electrons increase as we move down the group. So, the tendency to gain an electron decreases as we move down the group which is directly proportional to the reactivity of the non-metal.
Why does reactivity decrease from left to right?
And you go from left to right on the periodic table elements have more electrons in their valence shells they have to get rid off which requires an element to have high energies which results into lower Chemical Reactivity. For Non-Metals, the farther right-up in the table you go, the higher the electronegativity.
Why reactivity decreases down the group in halogens?
The reactivities of the halogens(17th group) 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.
Why does chemical reactivity increase from top to bottom?
Going from top to bottom in these groups, the outer shell electrons are further away from the nucleus and are more easily removed. Thus, the bottom elements of groups 1 A and 2 A will be more reactive.
What happens to the reactivity of nonmetals within a group from the top of the group to the bottom?
The reactivity of non metals decreases from top of the group to the bottom. The distance between the nucleus and the free electrons increase as we move down the group. So, the tendency to gain an electron decreases as we move down the group which is directly proportional to the reactivity of the non-metal.
Why does metal reactivity increase but?
When we move from top to doon of periodic groups of metals, the atomic size increases gradually. Due to this, nuclear attraction to the valence electron decreases. As a result, the tendency of metal atoms to lose electrons increases.
What happens to the reactivity of nonmetals as you move left to right across the periodic table?
In Non-metals Period - reactivity increases as you go from the left to the right. Group - reactivity decreases as you go down the group.
Why does the reactivity of elements increase moving left to right on the periodic table?
As we move from left to right the metalic properties decreases and non-metalic property increases hence reactivity of the elements decreases. Noble gases are placed at the extreme right of the period.
What happens to reactivity as you move down the group?
As we move down the group of 1 A. and 2 A which are metals, the reactivity increases as we move down the group.
Why does reactivity increase when you go up a group?
UP a Group: In NON-METALS reactivity INCREASES as you go UP a Group because the higher up and to the right atoms are, the higher the electronegativity, resulting in a more vigorous exchange of electrons. Fluorine? A greedy, impatient beast when it comes to electron exchange manners.
What happens to the group size as the size increases down?
As the size increases down the group attraction between incoming electron and nucleus decrease as a result reactivity of no metals decrease down the group…..
How many electrons are in an alkali metal?
All alkali metals have one electron in the outer shell. In a reaction, this electron is lost and the alkali metal forms a +1 ion. As you go down group 1, the number of electron shells increases – lithium has two, sodium has three etc. Therefore, the outermost electron gets further from the nucleus. The attraction from the positive nucleus to the negative electron is less. This makes it easier to remove the electron and makes the atom more reactive.
Why are electrons less attracted to the nucleus?
Therefore an outer electron is less strongly attracted to the nucleus, because the bunch of negative charge below it helps to repel it.
What happens to the atomic number as you go down a group?
As you go down a group the atomic number increases.
Where is the most reactive element in a series?
In a reactivity series, the most reactive element is placed at the top and the least reactive element at the bottom.