Chlorine.
Chlorine will have the smallest atomic radius, bromine the largest.
Chlorine has a larger atomic radius than fluorine. This is because chlorine has its outermost electrons in the 3rd energy level, which is farther from the nucleus, and fluorine has its outermost electrons in the 2nd energy level, which is closer to the nucleus.
bromine
Flourine
francium has the largest ionic radius
bromine
Bromine is farther down the group and has more electron shells, making it an element with a lager atomic radius.
Potassium has the largest atomic radius. It is in the 1st group of the periodic table. Fluorine has the least atomic radius.
Chlorine will have the smallest atomic radius, bromine the largest.
Chlorine has a larger atomic radius than fluorine. This is because chlorine has its outermost electrons in the 3rd energy level, which is farther from the nucleus, and fluorine has its outermost electrons in the 2nd energy level, which is closer to the nucleus.
bromine
Flourine
francium has the largest ionic radius
Fluorine is more reactive than chlorine.
Fluorine has more electronegativity, meaning it is more "desperate" to obtain electrons. Its nucleus is the most attractive of all elements.
Fluorine has more electronegativity, meaning it is more "desperate" to obtain electrons. Its nucleus is the most attractive of all elements.
Fluorine has more electrons in it's outer most shell, so it is more compact and attracted to the nucleus more. For more information on it, look up atomic radius trends in Google.