4.4 Bonding in Metals

Why are alloys generally used to make everyday objects?

• Alloys are often stronger and less active than pure metals.
• Alloys have higher melting point than pure metals.
• Alloys are less expensive to produce than pure metals.
• Alloys have ionic bonds instead of metallic bonds.

Tags

NGSS.HS-ETS1-3

Metallic bonding is...

• a type of covalent bond.
• a type of ionic bond.
• an attraction between positive and negative ions.
• an attraction between positive ions and electrons.

Which of the following is NOT a property of a metal?

• ductile
• good electrical conductor
• good thermal insulator
• malleable

At room temperature, most metals are

• liquid
• solid
• gas
• an alloy

Tags

NGSS.MS-PS1-4

An attraction between a positive metal ion and surrounding electrons is a(n) ____________bond.

• metallic
• ionic

Metals typically have ____________melting points.

• High
• Low

The metal fins that cool a motorcycle's engine make use of the high _____________conductivity of metals. 

• thermal
• electrical

Tags

NGSS.HS-PS3-4

Metals are often used to make wire because they are 

• malleable
• ductile

Metals are used in electrical wires because they have a high ____________conductivity. 

•  electrical
• thermal

Tags

NGSS.HS-PS2-6

Nonmetals are unlikely to form metallic bonds because their ____________ are strongly held. 

• positive ions
• valence electrons

Tags

NGSS.HS-PS1-1