As you move from Astatine to Fluorine the reactivity increases
The reactivity of halogens decreases down the group, which means Fluorine is the most reactive halogens as it is the most electronegative elements among the halogens, and also the Periodic Table.
The chemical reactivity increase down in the group.
Halogens among halogens fluorine is most reactive
Reactivity is a term related to the aggressiveness (or not) of an element to combine with other elements. Oxygen, Chlorine, and Fluorine are among the most aggressive.
Chlorine is the strongest oxidizing agent among the halogens because it has the highest electronegativity and the smallest atomic radius, allowing it to attract and gain electrons more easily, making it more reactive in chemical reactions.
In terms of acidity HI > HBr > HCl > HF
Fluorine has the largest first ionization energy among the halogens.
This depends on what tools you have at hand. Are you using a computer and trying to vertically center a letter in a table cell? or are you nailing a letter on a board? On the computer the program you are using may have a "center vertically" among it's formatting commands.
because to be stable they need 8 atoms in outer energy level halogens need one so are highly reactive. alkali need 7 so are highly reactive( not as highly as halogens)
because to be stable they need 8 atoms in outer energy level halogens need one so are highly reactive. alkali need 7 so are highly reactive( not as highly as halogens)
because bromine is reactive among all halogens
Atoms that have the same number of outer electrons are known as elements within the same group or column of the periodic table. These outer electrons, or valence electrons, play a crucial role in determining an element's chemical properties and reactivity. For example, elements in Group 1 (alkali metals) all have one outer electron, while those in Group 17 (halogens) have seven outer electrons. This similarity in valence electrons helps explain the trends in reactivity and bonding among these elements.