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