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