SCIENCE
CHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Group of elements whose ending e-configuration is p5. 7 electrons in outer level, easily gain electrons.
|
|
Noble gases
|
|
|
Halogens
|
|
|
Chalcogens
|
|
|
Nitrogen Group
|
Explanation:
Detailed explanation-1: -Chlorine (Cl), which is in group 17, has 7 electrons in its outer energy level and is one electron short of having a “full” outermost energy level.
Detailed explanation-2: -For stability, the atom needs to have a full outer shell. Group 7 elements need to gain 1 electron to have a full shell.
Detailed explanation-3: -The Group 7 elements – fluorine (F), chlorine (Cl), bromine (Br), iodine (I) and astatine (At) – have seven electrons in the outer shell.
Detailed explanation-4: -The halogens all have seven electrons in their outer shells. The electron configuration in the outer shell is ns2np5. As the atomic number increases, the reactivity of the halogens decreases.
There is 1 question to complete.