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homework: intensive and extensive properties
1. which set of properties, intensive or extensive, are based on the size of a sample?
2. what does it mean for a material to be malleable?
3. what does it mean for a material to be ductile?
4. what is the name of this section of the periodic table?
5. what physical property do these elements have in common?

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Accepted Answer

### Question 1
# Brief Explanations:
Intensive properties are independent of the amount of substance (e.g., density, melting point), while extensive properties depend on the amount (e.g., mass, volume). So extensive properties are based on sample size.
# Answer:
Extensive properties are based on the size of a sample.

### Question 2
# Brief Explanations:
Malleability is a physical property of materials (especially metals) that describes the ability to be hammered, rolled, or pressed into thin sheets without breaking.
# Answer:
A malleable material can be hammered or rolled into thin sheets (e.g., metals like gold, aluminum are malleable).

### Question 3
# Brief Explanations:
Ductility is a physical property of materials (typically metals) referring to the ability to be drawn, pulled, or extruded into a thin wire without breaking.
# Answer:
A ductile material can be drawn into a thin wire (e.g., copper is ductile and used in electrical wires).

### Question 4
# Brief Explanations:
The elements Fe (Iron), Co (Cobalt), and Ni (Nickel) are in the "Iron Triad" and belong to the transition metals section of the periodic table, specifically the group of metals with similar magnetic properties and are ferromagnetic.
# Answer:
These elements (Fe, Co, Ni) are in the transition metals section, specifically part of the ferromagnetic metals or the "Iron - Cobalt - Nickel" group (they are transition metals and ferromagnetic).

### Question 5
# Brief Explanations:
Iron (Fe), Cobalt (Co), and Nickel (Ni) are all ferromagnetic metals, meaning they are strongly attracted to magnets and can be magnetized themselves. They also share metallic properties like malleability, ductility, and good electrical conductivity.
# Answer:
These elements (Fe, Co, Ni) are all ferromagnetic (strongly magnetic), malleable, ductile, and good conductors of heat and electricity (they are transition metals with metallic properties and ferromagnetic behavior).

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