Question

Part A Why are the halogens among the most active nonmetals ? Why are the halogens among the most active nonmetals ? They only need one electron needed to attain a nobel gas configuration Their d orbitals are completely filled. All halogens have low electron affinities. They all have smaller diameters than other nonmetals. Their valence electrons are more effectively shielded.

Answer 1

Answer: They only need one electron needed to attain a nobel gas configuration

Step-by-step explanation:

In the periodic table, HALOGENS are found in group 17 and it's consist of the following elements:Fluorine, chlorine, bromine, iodine. Astatine.

All these are known to be very active non metals because they only need one electron to attain a nobel gas configuration (stability). Atoms of elements consist of nucleus that is surrounded by electrons that moves around in orbitals. Valence electrons are those electrons found on the outermost shell of an atom and the reactivity of an atom is based on it. For an atom to be nonreactive it most have eight electrons in its outermost shell. All members of halogen family have seven valence electrons. Because they are very close to having a complete set of eight valence electrons, this makes them active.

Answer 2

the correct option is:

We only need one electron to achieve a noble gas configuration

Step-by-step explanation:

Halogens have 7 valence electrons in their outer energy shell, so when reacting with another element they satisfy the octet rule.

Halogens show trends in their binding energy from top to bottom on the periodic table with fluoride showing minimal deviation. They are shown to have strong bonding energy with other atoms but weak interactions with the F2 diatomic molecule. This means that as you go down the periodic table the reactivity of the element decreases due to the increase in the size of the atom.

Halogens are highly reactive, so they can be harmful to biological organisms in sufficient quantities. Its high reactivity is due to the high electronegativity that its atoms present due to its highly effective nuclear charges.