How Many Lone Pairs of Electrons Are on the S

question 38

Multiple Choice

How many lone pairs of electrons are on the S atom in SF₄ ?

• A)0
• B)1
• C)2
• D)3

---

Definitions:

Closed-Anchor Brake Shoe

A brake shoe configuration where the ends are fixed in place, enhancing braking stability and force.

Anchor Pin

A pin used to secure or anchor components together, often found in brake assemblies to hold brake shoes in place.

S-cam Brake Systems

A type of drum brake system commonly used in heavy vehicles, where the rotation of an S-shaped camshaft forces brake shoes outward to create friction.

Air Disc Brakes

A type of brake system used in vehicles, particularly heavy-duty trucks and buses, that uses air pressure to push pads onto a disc to create friction and stop the vehicle.