1.
Metals are ___________, and can be drawn into a wire.
Correct Answer
D. Ductile
Explanation
Metals are ductile, meaning they have the ability to be drawn into a wire. This property is due to the metallic bonds between atoms, which allow for the movement of electrons and the rearrangement of atoms without breaking the material. This flexibility and ability to be stretched make metals useful in various applications, such as electrical wiring, where they can be easily formed into long, thin conductive wires.
2.
______________ describes the way a substance reflects light, or SHINES.
Correct Answer
C. Luster
Explanation
Luster refers to the way a substance reflects light or shines. It is a property that describes the appearance of the surface of a material when light is reflected off of it. Luster can range from being shiny and reflective, like a mirror, to dull and non-reflective. It is often used to describe the appearance of minerals and metals, with some substances having a high luster and others having a low luster.
3.
_______________ describes how well the substance can be hammered into sheets.
Correct Answer
A. Malleability
Explanation
Malleability refers to the ability of a substance to be hammered into thin sheets without breaking or cracking. It is a property commonly observed in metals, such as gold and silver, which can be easily shaped and flattened into sheets. Malleability is important in various industries, including metalworking and construction, as it allows for the creation of different shapes and structures. Conductivity, ductility, and luster are unrelated properties that do not describe the ability to be hammered into sheets.
4.
If a substance breaks easily, it is said to be ________________.
Correct Answer
C. Brittle
Explanation
Brittle is the correct answer because when a substance breaks easily, it means that it is fragile and prone to shattering or cracking when subjected to stress or pressure. This characteristic is commonly associated with brittle materials, which lack the ability to deform plastically and instead undergo brittle fracture.
5.
Metalloids are the best conductors of electricity
Correct Answer
B. False
Explanation
Metalloids are not the best conductors of electricity. While they have some properties of metals and some properties of non-metals, they generally have lower electrical conductivity compared to metals. Metalloids such as silicon and germanium have semiconducting properties, meaning their conductivity can be controlled and modified. However, metals like copper and silver are known for their high electrical conductivity and are considered better conductors of electricity. Therefore, the statement "Metalloids are the best conductors of electricity" is false.
6.
Nonmetals are usually GOOD conductors of heat and electricity.
Correct Answer
B. False
Explanation
Nonmetals are usually POOR conductors of heat and electricity. Unlike metals, nonmetals do not have a high number of free electrons that can easily move and carry heat or electricity. Instead, nonmetals tend to have tightly bound electrons that do not move as freely, resulting in lower conductivity. Therefore, the correct answer is False.
7.
Nonmetals are not attracted to magnets.
Correct Answer
A. True
Explanation
Nonmetals, such as carbon, oxygen, and nitrogen, do not possess magnetic properties. Unlike metals, which have free electrons that can easily align with an external magnetic field, nonmetals lack these free electrons. As a result, nonmetals are not attracted to magnets. Therefore, the statement "Nonmetals are not attracted to magnets" is true.
8.
Metals are the most conductive elements on the Periodic Table.
Correct Answer
A. True
Explanation
Metals are known to be excellent conductors of heat and electricity due to the presence of free electrons in their atomic structure. These free electrons can move easily through the metal lattice, allowing for the efficient transfer of energy. This property makes metals the most conductive elements on the Periodic Table. Therefore, the statement is true.
9.
Metals can be drawn into a wire.
Correct Answer
A. True
Explanation
Metals can be drawn into a wire because they have a high ductility, which means they can be easily stretched and shaped without breaking. This property is due to the metallic bonds between atoms, which allow for the movement of electrons and the rearrangement of the metal's atomic structure. As a result, metals can be drawn into thin wires, making them useful for various applications such as electrical wiring and jewelry making.
10.
Metals lack luster, are brittle, and do not conduct electricity.
Correct Answer
B. False
Explanation
The statement given in the question is incorrect. Metals have a lustrous appearance, are malleable (not brittle), and are good conductors of electricity. Therefore, the correct answer is False.