10 Questions
Which element has the atomic number 17?
Chlorine
Which element has the highest atomic weight?
Barium
Which element has a density of solid, 20°C, approximately 7.87 g/cm³?
Silver
Which element has a melting point of approximately 1538°C?
Titanium
Which element has a crystal structure, 20°C, of BCC (Body-Centered Cubic)?
Nickel
Which type of material is classified based on the regularity of atomic arrangement?
Crystalline materials
What is the defining characteristic of a crystalline material?
Long-range order of atoms
Which materials form crystalline structures under normal solidification conditions?
Metals, many ceramic materials, and certain polymers
What do some of the properties of crystalline solids depend on?
The crystal structure of the material
What is the characteristic of noncrystalline or amorphous materials?
Long-range atomic order is absent
Study Notes
Element Identification
- Chlorine has an atomic number of 17.
Element Properties
- The element with the highest atomic weight is not specified, but it is Francium (Fr) in the periodic table.
- The element with a density of solid, 20°C, approximately 7.87 g/cm³ is Iron (Fe).
Crystal Structure and Properties
- The element with a melting point of approximately 1538°C is Tungsten (W).
- Iron (Fe) has a crystal structure, 20°C, of BCC (Body-Centered Cubic).
Crystalline Materials
- Crystalline materials are classified based on the regularity of atomic arrangement.
- The defining characteristic of a crystalline material is the regular and repeating pattern of atoms.
- Metals, including Iron (Fe), form crystalline structures under normal solidification conditions.
- Some properties of crystalline solids depend on the arrangement of atoms in the crystal lattice.
Noncrystalline Materials
- The characteristic of noncrystalline or amorphous materials is the lack of a regular and repeating pattern of atoms.
Test your knowledge of the characteristics of selected elements with this quiz. Identify the element symbol and atomic number for each element listed, including aluminum, argon, barium, beryllium, and more.
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