T and U are elements of Period 2. Element T has a half-filled L shell. Element U is a halogen. T and U combine to form a molecular compound.

a)State the group number for T and U respectively
b)Draw the Lewis structure for the molecule formed between T and U.
c)Predict the shape of the molecule.

18. A dative bond is formed in the reaction between BCl3 and Cl−:
BCl3 + Cl  BCl4−

a)Use the Lewis electron-dot method to show the formation of the dative bond.
b)What is the geometrical shape of BCl4−?

Question

T and U are elements of Period 2. Element T has a half-filled L shell. Element U is a halogen. T and U combine to form a molecular compound. 

a)State the group number for T and U respectively
b)Draw the Lewis structure for the molecule formed between T and U.
c)Predict the shape of the molecule. 

18.	A dative bond is formed in the reaction between BCl3 and Cl−:
			BCl3  +  Cl    BCl4−

a)Use the Lewis electron-dot method to show the formation of the dative bond.
b)What is the geometrical shape of BCl4−?

anonymous · Answer

BCl3  +  Cl-  -->  BCl4−

unklerhaukus · Answer

do you know what group the halogens are in on the periodic table?

anonymous · Answer

group 17 is for the halogen

unklerhaukus · Answer

correct and , where would you find a half filled shell?

unklerhaukus · Answer

there are two regions the have half filled shells

anonymous · Answer

L shells is where the 2nd shells which is can occupied with 8 electrons
So,half-filled means its occupied 4 electrons
Element T is carbon I guess

unklerhaukus · Answer

dosen't Hydrogen work also?

unklerhaukus · Answer

ah wait Period 2,
yeah you right carbon