What is the Lewis dot structure for the following sif4 c2h6 mgh2 lih bh3?

Answer 1

.....H

.....|

H- Si - H

.....|

.....H

SiH4

This is tough to draw without special characters to work with. Disregard the dots in the diagram. It was necessary to put those in there only so the H bonds would line up correctly.

Basically Si has four valence electrons so single bonds extend out from it in the shape of a cross around Si in the center. There is one H atom at the other end of each single paired bond coming from the Si atom. This arrangement gives Si a stable octet of eight shared electrons. The H atoms are stable sharing 2 electrons each. I hope that helps.

Answer 2

1. SiF4: Silicon has 4 valence electrons and each fluorine contributes 1, totaling 8 valence electrons. Arrange them around the silicon atom with a lone pair on the silicon.
2. C2H6: Each carbon in ethane (C2H6) will form four single bonds with neighboring hydrogen atoms, satisfying the octet rule for carbon while completing the duet rule for hydrogen.
3. MgH2: Magnesium has 2 valence electrons and each hydrogen contributes 1. Magnesium will form 2 single bonds with hydrogen atoms.
4. LiH: Lithium has 1 valence electron and hydrogen contributes 1. Lithium will form a single bond with hydrogen.
5. BH3: Boron has 3 valence electrons and each hydrogen contributes 1. Boron will form 3 single bonds with hydrogen atoms.

Answer 3

h h

: :

h:c:c:h

: :

h h

h:b:h

:

h

Answer 4

H

••

H: B :H

••

H

and the Central boron atom will have a -1 formal charge

Answer 5

What is Lewis structure for mgh2