Q: Answer the following question given this paragraph: Boron forms multicenter bonds rather than metallic lattices with delocalized valence electrons. Why does it prefer this type of bonding? Does this explain why boron behaves like a semiconductor rather than a metal? Explain your answer. Q: What kind of bonds does boron form rather than metallic lattices? A: | OPTIONS:
- magnetic bonds
- electron bonds
- bilateral
- multicenter
A: multicenter

Q: Answer the following question given this paragraph: High-density materials are much more effective protection against gamma emissions than low-density ones. Gamma rays are usually blocked effectively by lead shielding. The thickness of the shielding will determine the effectiveness of the protection offered by the lead. Q: What element is typically used to shield things from gamma rays? A: | OPTIONS:
- gold
- silver
- aluminum
- lead
A: lead

Q: Answer the following question given this paragraph: An element is a pure substance. It cannot be broken down into other types of substances. Each element is made up of just one type of atom. An atom is the smallest particle of an element that still has the properties of that element. Q: What is the term for the smallest particle of an element that still has the properties of that element? A: | OPTIONS:
- nucleus
- electron
- neutron
- atom
A: atom

Q: Answer the following question given this paragraph: For many decades, scientists have known that atoms consist of electrons and other particles called protons and neutrons. Recently they found that there are even smaller particles in atoms. Scientists call these extremely tiny particles by the funny name of quarks. As you can see in this diagram, there are several different kinds of quarks, called up quarks, down quarks, top quarks, bottom quarks, charm quarks, and strange quarks. In this chapter you'll learn about these unusual particles and also other particles inside the atom. Q: For many decades, scientists have known that atoms consist of electrons and other particles called protons and? A: | OPTIONS:
- rods
- waves
- nanoparticles
- neutrons
A: neutrons