ALLOY, USES, METAL, NON METAL AND BONDING

Which of the following is a characteristic of metals?

• Brittle

• Poor conductor of electricity

• Malleable

• Non-lustrous

Which among these elements occur naturally in large mounts?

• Francium

• Magnesium

• Neptunium

• Plutonium

Which of the following metals is most commonly used for electrical wiring?

• Iron

• Copper

• Silver

• Gold

What property makes metals suitable for use in electrical appliances?

• High melting point

• Conductivity

• Density

• Brittleness

What type of bonding is primarily responsible for the properties of metals?

• Ionic bonding

• Covalent bonding

• Metallic bonding

• Hydrogen bonding

Which of the following is a characteristic property of metals due to metallic bonding?

• High melting points

• Brittleness

• Poor electrical conductivity

• Low density

In metallic bonding, what is the term used to describe the free-moving electrons?

• Valence electrons

• Core electrons

• Delocalized electrons

• Bonding electrons

Which property of metals is explained by the presence of delocalized electrons?

• Transparency

• Malleability

• Solubility in water

• Low melting point

What is the primary reason metals are good conductors of electricity?

• a) Presence of ionic bonds

• b) Presence of covalent bonds

• c) Presence of free-moving electrons

• d) Presence of hydrogen bonds

Which of the following is a common property of metals?

• a) Brittle

• b) Poor conductor of electricity

• c) Malleable

• d) Non-lustrous