Metallic Bonds and Alloys

Metallic Bonds and Alloys

Multiple Choice

Which of the following lists of elements contain only metals?

• Li, Al, Te

• Ni, Pb, H

• Na, Os, Ga

• Ca, Zn, I

Multiple Choice

There are more metals than non metals in the periodic table.

• True
• False

Fill in the Blank

A metal ion has a(n) _____________ electric charge

Multiple Choice

In metallic bonds, the force of attraction is between

• positive and negative ions

• cations and electrons

• two different metals

• neutrons and electrons

Multiple Choice

In metals, the valence electrons are

• attached to the most positive ions

• shared by all of the atoms

• are bonded to the least electronegative element

• shiny

Multiple Choice

Metals are hard because metals have a

• sea of electrons that tightly hold the nuclei together

• they form triple bonds

• low melting point

• high luster

Multiple Choice

Metals are ductile because metallic bonds

• hold the layers of ions in rigid positions

• maximizes the repulsive force in a metal

• allows planes of protons and electrons to slide past one another

• are easily broken

Multiple Choice

Malleability means

• the ability to be drawn into a wire

• the electrons of metals are mobile

• the ability to be hammered into a shape

• the ability to be a conductor of electricity

Multiple Choice

Why are metals good conductors?

• they have mobile electrons

• they have mobile atoms

• they have crystal structures that can rearrange

• they have mobile protons

Multiple Choice

Malleability and ductility are characteristics of compounds with

• covalent bonds

• metallic bonds

• ionic bonds

• alloy bonds

Multiple Choice

Alloys are important because

• their properties are often superior to the component elements

• their properties are a blend of the component elements

• they never corrode

• they are less expensive than their component elements.

Multiple Choice

Brass is an alloy of iron and copper

• true

• false

Multiple Choice

An alloy of iron and carbon is

• more likely to rust than pure iron

• weaker than pure iron

• a mixture of two METALS

• known as steel

Multiple Select

What are the two forms of alloys

• Interstitial

• Comprehensional

• Institutional

• Substitutional

Multiple Choice

_____________ alloys have smaller atoms that fit into the spaces between larger atoms

• Interstitial

• substitional

• institutional

• international

Poll

How do you feel about today's lesson?

• I completely understood everything.

• I understood most of it, but I have some questions.

• I understood about half of it, and I have a lot of questions.

• I understood less than half. I need extra help.