Group 7A nonmetals react by gaining an electron. The electron affinity generally decreases going down the group. This trend parallels chemical reactivity.
The reactivity of group 17 elements differ as you move down the periods. Group 17 elements are missing 1 electron from their valance shell making them highly votile and reactive.I'll try not to make this confusing:1. As elements get bigger, they have a higher level of reactivity. (More "pull" needed from protons in the nucleus in order to keep valance shell electrons in orbit).2. As you move from left to right in the groups, you have a higher level of reactivity.3. Groups 1 and 17 have the highest levels of reactivity (except hydrogen in group 1) because they are away by only 1 valence electron.
The most active elements on the periodic table are found on the left side and in the bottom rows, specifically the alkali metals (Group 1) and the alkaline earth metals (Group 2). Alkali metals, such as sodium and potassium, are highly reactive, particularly with water, and their reactivity increases as you move down the group. In contrast, halogens (Group 17) on the right side of the table are also very reactive, with reactivity decreasing down the group. Overall, reactivity trends vary depending on whether the elements are metals or nonmetals.
Nonmetal activity tends to decrease as one goes down Group 17 (halogens) because the atomic size increases along the group, leading to weaker attraction for electrons and thus decreasing reactivity. Additionally, the atomic number increases which leads to increasing electron shielding and decreasing effective nuclear charge, reducing the tendency to gain electrons.
In the periodic table, the reactivity of the halogens that are found in Group 17 decreases as you go down the column of elements in this group. The first element of the group is fluorine, and it has the highest reactivity. The other elements in this group are chlorine, bromine, iodine, and astatine.
The reactivity of non-metal elements generally decreases as you move from left to right across groups 13-17 of the periodic table. This is because the elements have an increasing number of valence electrons and are closer to achieving a stable electron configuration. Non-metals in group 17 (halogens) are the most reactive due to their high electronegativity and affinity for gaining electrons to achieve a full outer shell.
As you move down Group 17 (halogens) from top to bottom, the reactivity decreases. This is due to the increasing atomic size and electron shielding, making it more difficult for the outer electron to be gained by the lower elements in the group, thus decreasing their reactivity.
The periodicity of nonmetals is that reactivity increases from left to right across a period, through group 17, the halogens. As you move down a group, reactivity decreases. Fluorine is the most reactive element.
The reactivity decreases down group 7. Group 7 elements have 7 valence electrons (electrons on the very last electronic shell), so this means it need to attract one electron (because its harder to lose 7 than attract 1) to attain stable electronic configuration of 8 electrons. Now because atomic radii decreases down a group, the nucleus is further away from the electrons, and the further away they are, the lower the force of attraction, making it harder to form a bond, meaning, they react less readily. Volia! Reactivity decreases down group 7. This is also the reason why reactivity increases down group 1 Because there is 1 valence electron, it needs to lose 1 electron to attain stable electronic configuration (because its harder to attract 7 than lose 1) and because the atomic radii decreases down a group (this rule is constant through the entire periodic table) the attraction is weaker, so its easier to lose 1 electron, making it easier for group 1 to bond, meaning, they react more readily.
The reactivity of group 17 elements differ as you move down the periods. Group 17 elements are missing 1 electron from their valance shell making them highly votile and reactive.I'll try not to make this confusing:1. As elements get bigger, they have a higher level of reactivity. (More "pull" needed from protons in the nucleus in order to keep valance shell electrons in orbit).2. As you move from left to right in the groups, you have a higher level of reactivity.3. Groups 1 and 17 have the highest levels of reactivity (except hydrogen in group 1) because they are away by only 1 valence electron.
Atomic size increases down a group as the energy level (or shell) increases. So Astatine will have the largest size (radius) in group 17
The most active elements on the periodic table are found on the left side and in the bottom rows, specifically the alkali metals (Group 1) and the alkaline earth metals (Group 2). Alkali metals, such as sodium and potassium, are highly reactive, particularly with water, and their reactivity increases as you move down the group. In contrast, halogens (Group 17) on the right side of the table are also very reactive, with reactivity decreasing down the group. Overall, reactivity trends vary depending on whether the elements are metals or nonmetals.
they become more reactive since you are moving from left to right on the Periodic Table, the elements in group 17 are the most reactive.
Nonmetal activity tends to decrease as one goes down Group 17 (halogens) because the atomic size increases along the group, leading to weaker attraction for electrons and thus decreasing reactivity. Additionally, the atomic number increases which leads to increasing electron shielding and decreasing effective nuclear charge, reducing the tendency to gain electrons.
they become more reactive since you are moving from left to right on the Periodic Table, the elements in group 17 are the most reactive.
In a group labeled as A, as atomic numbers increase across a period, the reactivity of elements generally decreases. This is because as you move from left to right across a period, the elements have more protons in the nucleus, which leads to stronger nuclear charge and less tendency to lose electrons and react with other elements.
Reactivity of an element is not directly indicated by its position on the periodic table. However, general trends can be observed - for example, elements in group 1 and group 17 tend to be highly reactive due to their tendency to gain or lose electrons, respectively.
Fluorine, chlorine, and iodine are all halogen elements located in Group 17 of the periodic table. They are all nonmetals and exhibit similar chemical properties due to their shared group. As you move down the group from fluorine to iodine, the reactivity of the elements generally decreases.