SCIENCE
CHEMISTRY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
+2
|
|
|
-3
|
|
|
+1
|
|
|
-1
|
Detailed explanation-1: -Because boron and nitrogen together contain the same number of valence electrons (eight) as two bonded carbon atoms, boron nitride is said to be isoelectronic with elemental carbon.
Detailed explanation-2: -So valency of Boron is three. Therefore, it makes three sigma bonds with three fluorine atoms.
Detailed explanation-3: -Boron has atomic number 5. Thus its valency is 8-5 =3.
Detailed explanation-4: -Boron has electronic configuration 2, 3. So it will lose 3 electrons rather than gaining 5 electrons. Thus the valency of nitrogen and boron is 3.
Detailed explanation-5: -Answer and Explanation: Boron has 3 valence electrons. The number of valence electrons within an atom of an element simply corresponds to an element’s group (column) on the period table.