Which property of metals is directly influenced by metallic bonds?
Solubility in water
Low density
Electrical insulation
High melting points
Why are metals like copper, aluminum, and iron commonly recycled?
They are abundant in the earth’s crust
Recycling is often more expensive than extraction
It is easy to extract them from their ores
Their percentage in the earth’s crust decreases, and recycling is cheaper than extracting from ores
Which of the following is an exception among nonmetals due to its use in dry cells and ability to conduct electricity?
Carbon in the form of graphite
Copper
Sulfur
Sodium
Which of the following is a reason for recycling metals rather than extracting them from ores?
Recycling requires more energy
It is difficult and costly to extract them from their ores
Metals are unlimited in ores
Extracted metals are purer
Which of the following metals is known for its metallic luster and ductility?
Graphite
Carbon
How does the number of valence electrons affect the hardness of metals?
Hardness is only affected by atomic mass.
The number of valence electrons has no effect on hardness.
Hardness decreases with an increase in valence electrons.
Hardness increases with an increase in valence electrons.
Which property is most likely to be observed in a metallic element compared to a nonmetallic element?
Brittle texture
Metallic luster
Non-conductive nature
How do metals typically differ from nonmetals in terms of physical properties?
Metals are brittle and non-lustrous.
Nonmetals are ductile and malleable.
Nonmetals have high melting points.
Metals are good electrical and thermal conductors.
Which of the following statements is true regarding the physical state of metals and nonmetals?
Nonmetals are only gases.
All metals are liquids except mercury, which is a solid.
All metals are solids except mercury, which is a liquid.
Nonmetals are either solids or liquid , except bromine, which is a gas.
In metallic bonds, the metal atoms are:
Not present as individual entities
Neutral.
Charged as anions.
Charged as cations.
Nonmetals are usually brittle and lack the malleability and ductility of metals
True
Flase
What is the primary application of bronze alloy ?
Aerospace components
Automotive parts
Electrical wiring
Jewelry, medals, and statues
What property of metals allows them to be drawn into wires?
Opacity
Brittleness
Ductility
Poor thermal conductivity
Metals are typically malleable, meaning they can be hammered or rolled into thin sheets without breaking
False
Among the following, which is not a characteristic feature of metals?
High electrical resistance
Malleability
Ability to form alloys
What is responsible for the high melting points and hardness of metals?
Covalent bonds
Hydrogen bonds
Ionic bonds
Metallic bonds
Which property is characteristic of metals that helps in their usage in wiring and cookware?
Thermal conductivity
Insulation properties
Which of the following is a characteristic electron configuration of the last energy level in most metals?
4 electrons
1, 2, or 3 electrons
8 electrons
5, 6, or 7 electrons
What is the process of converting waste materials into new usable substances known as?
Digestion
Composting
Reprocessing
Recycling
What is an alloy?
A synthetic metal
A compound of a metal and a nonmetal
A pure metallic element
A mixture of two or more metals or metals with nonmetals, which does not have a molecular formula
Which of the following properties is typically found in metals but not in nonmetals?
Formability
All of the above
What is the arrangement of atoms in solid metals known as?
Covalent lattice
Metallic crystal lattice
Ionic lattice
Molecular lattice
Which of the following is the correct arrangement of the hardness of sodium 11Na, magnesium 12Mg, and aluminum 13Al?
Al > Mg > Na
Al > Na > Mg
Mg > Na > Al
Na > Mg > Al
Element (X) its boiling point is 2807°C and its melting point is 1064°C. Which of the following is a property of element (X)?
Ductile
Bad electrical conductor
Opaque
Brittle
What is a common characteristic of nonmetals like carbon and sulfur?
High electrical conductivity
Brittleness and opacity
High thermal conductivity
How are alloys typically expressed in terms of composition?
As homogeneous mixtures without fixed ratios
Through their crystalline structures
As mixtures, usually not expressed in molecular formulas
Using molecular formulas
Which of the following questions helps in the classification of some elements to metals and nonmetals?
Is it brittle?
Is it solid?
Is it liquid?
Is it colored?
All the following are properties of the sodium element, except ................
bad electrical conductor
a metal
has metallic luster
formable
What is the common property of both sodium and copper?
Colour
Physical state
Melting point
Density
Which of the following best describes the appearance of most metals compared to nonmetals?
Shiny with metallic luster
Transparent
Always liquid at room temperature
Opaque with no luster
What term describes the force of attraction in a metallic bond?
The attraction between neutral atoms.
The ionic bond between lattice structures
The repulsive force between negative ions.
The attraction between positive metal ions and a cloud of free-moving valence electrons
What is a characteristic feature of bronze compared to pure copper?
Bronze is softer than copper
Bronze rusts more easily than copper
Bronze has a lower melting point than copper
Bronze is harder than copper and does not rust.
Why are pure metals often combined to form alloys for industrial use?
Pure metals are too expensive.
Pure metals are soft and unsuitable for most industrial applications.
Pure metals are too hard
Pure metals are non-conductive
In the structure of a metallic crystal lattice, what role do the valence electrons play?
They are tightly bound to individual atoms.
They are completely absent.
They form covalent bonds between metal ions
They move freely within the lattice.
Which metals primarily compose bronze, an alloy used in jewelry and statues?
Copper and silver
Copper (95%) and tin (5%)
Copper and zinc
Copper and nickel