Physical Science Chapter 6 Lesson 4 Questions

What type of microscope was used to take the photograph of the tungsten filament from a light bulb?

• Optical microscope

• Scanning electron microscope

• Transmission electron microscope

• Compound microscope

Tags

NGSS.MS-PS4-2

What was one challenge for researchers around 1900 regarding light bulb filaments?

• Finding a material that was transparent

• Finding a material that was colorful

• Finding a material that was ductile enough to be drawn into a narrow wire

• Finding a material that was magnetic

Tags

NGSS.MS-ETS1-1

Which property was necessary for the filament material to prevent melting when an electric current passes through?

• High density

• Low melting point

• High melting point

• High reflectivity

Tags

NGSS.MS-PS3-3

Which metal has the highest melting point?

• Iron

• Gold

• Tungsten

• Silver

What is the melting point of tungsten?

• 2500°C

• 3410°C

• 1500°C

• 4000°C

Tags

NGSS.MS-PS1-4

What are the forces that give a metal its structure as a solid?

• Ionic bonds between atoms

• Covalent bonds between molecules

• Strong metallic bonds between cations and valence electrons

• Hydrogen bonds between layers

What happens to metal atoms when there are no nonmetal atoms available to accept electrons?

• They form covalent bonds.

• They become anions surrounded by a pool of shared electrons.

• They become cations surrounded by a pool of shared electrons.

• They remain neutral.

What is a metallic bond?

• The attraction between a metal cation and the shared electrons that surround it.

• The attraction between two non-metal atoms.

• The sharing of electrons between two metal atoms.

• The transfer of electrons from a metal to a non-metal.

What determines the strength of metallic bonds?

• The number of protons in the nucleus

• The number of valence electrons an atom can contribute

• The atomic mass of the metal

• The density of the metal

Why are the bonds in alkali metals relatively weak?

• They have a high atomic mass

• They have a high melting point

• They contribute only a single valence electron

• They have a dense atomic structure

Tags

NGSS.HS-PS1-3